Grilled Pineapple Sundaes with Hot Buttered Rum Sauce

Grilled pineapple rum sundaes with caramelized fruit piled high, hot buttered rum sauce, cold vanilla ice cream, and whipped cream on top. Sweet, salty, warm, cold, and a little excessive in the right way.

GRILLED PINEAPPLE RUM SUNDAES, LATE SHIFT

I make these grilled pineapple rum sundaes more often than I probably need to explain, and every time I do, I end up thinking about where the idea came from. Pineapple, warmth, and sugar pushed far enough, with ice cream melting faster than planned. This never started as a recipe. It was just a habit.

I was sixteen when I got hired at Penguin’s Frozen Yogurt, which was kind of ridiculous on its face and somehow even more so in practice. There were four interviews. Four! Actual people from the “corporate office.” Hundreds of teenagers lining up for a job at a brand new frozen yogurt counter like we were auditioning for something. I remember sitting there thinking, this is frozen yogurt, while also hoping I got the job. Because this wasn’t regular frozen yogurt, it was cult-level status and it would be the coolest place to work in town.

Everything about the Penguin’s brand was black and white. Literally. The tile floor, counters, menu boards, uniforms. We could wear black shorts or white shorts, black pants or white pants, but everything had to be crisp. Perfect. A black apron, visor or hat, shirt always tucked in. There was no improvising or slouching. It was very much a look, controlled and put together. For a frozen yogurt place, it took itself extremely seriously.

On nights when the flavors changed, everything had to go. The machines couldn’t sit with yesterday’s yogurt in them, fruit couldn’t roll over, and older toppings couldn’t hang out, so if you worked the late shift, you went home with armfuls of whatever hadn’t made the cut. Quarts stacked in bags, containers of fruit, sauces, and half-used toppings. It felt like raiding, except it was encouraged.

Those were the nights I came home close to midnight, the garage door slamming behind me, keys still in my hand, bags digging into my hip. And before I could even get the door shut, I’d hear my dad from the living room.

“You work tonight?”

Which was never the real question.

My dad absolutely pretended he was waiting up to make sure I got home safely. He was not. He was waiting for the yogurt. Once I came through the door, he was fully awake, already mentally assembling a sundae before I’d even put my keys down.

“I’ve got pineapple,” I’d say. Or coconut, or raspberry, or some flavor they were retiring that week.

And that was it. The news went off. The Los Angeles Times was set aside. He was already on his feet.

The kitchen lights came on, all of them. The harsh fluorescent panels that turned the room into a laboratory instead of a house. We spread everything out across the counters like we were running experiments, not making sundaes. There was never a real plan. Someone, usually him, would crank the stove too high. I’d say, “That’s too hot.” He’d say, “It’s fine.” It never was.

Pineapple would hit the pan, followed by sugar in some form, and juice would go everywhere.

“That smells good,” he’d say. “That’s burning,” I’d say. “Same thing,” he’d answer.

Some nights we grilled fruit that had absolutely no business being grilled. Brown sugar went straight into pans, and butter always followed. Sometimes he poured in rum, or bourbon, apple cider even, or just whatever was open, and we argued about whether it was helping while continuing anyway. We tasted constantly, standing over the stove, enjoying our weird concoctions, and deciding what worked and what absolutely didn’t. Sugar fueled the chaos between us.

“No, that one’s bad.” “No it’s not, it just needs something.” “It needs less.” “It needs more.”

Over time the bowls got bigger, and the combinations got stranger, the whole thing spiraling in ways that felt completely normal at the time.

I rarely went to bed before two on those nights. School in the morning barely registered. The kitchen stayed lit up like a crime scene. Everything was sticky. But really, it was just us, making something unnecessary and perfect out of whatever I happened to bring home.

What’s funny is I didn’t connect this to anything else for years. Not my obsession with pineapple or my love of ice cream. Not even to the fact that when I first encountered Salt & Straw and their completely unhinged flavor combinations, blue cheese, olive oil, fried chicken skin, corn bread, my immediate reaction was yes, obviously. Of course that’s normal. I need to try it. I trust whoever’s brain is behind it.

It took me years to realize those late-night sundae-building sessions weren’t a phase. They were training.

I think those early cooking experiments taught me that wild flavors don’t need someone’s consent, that sugar and salt belong together always, and that you can push fruit until it’s almost gone too far and then pull it back at the last second. Dessert doesn’t need polish to be good.

These sundaes are the grown-up version of that chaos. The flavors are familiar, but my timing is better. The pineapple gets grilled until it smells like sugar and smoke, and the rum gets reduced into something you spoon instead of splash. The ice cream melts just enough to matter, then stops.

I make these now because they still feel like staying up too late with the lights on, knowing who you want to be in the kitchen with, and not needing a reason beyond that.

And every time I grill the pineapple, I can hear him asking, “What else have we got?”

When I make grilled pineapple rum sundaes, I think I’m just making dessert, right up until I’m not, and the back door slams a little harder than it needs to and the house gives that hollow nighttime sound that only happens after everyone else has gone to sleep.

I still think the best things happen after closing time.

WHY I LOVE THIS RECIPE

• Ghee is the difference between char and regret. Butter burns on a grill pan. I learned that the hard way years ago. At its core, this starts as grilled glazed pineapple, but the heat is only the beginning. Ghee gives you real caramelization and grill marks without the bitter edge, which means the pineapple tastes like fruit, not smoke and disappointment.
• The rum sauce comes from what’s already there. Using the pineapple marinade as the base means nothing feels added on. The brown sugar, rum, and juice are already working together, so when you reduce it with butter, it turns into a sauce that makes sense instead of a separate thought.
• Grilled pineapple needs to stand on its own. Thick slices, high heat, and time left alone are required. Treated casually, pineapple turns watery and limp fast. When you treat it properly, it holds its shape, takes on color, and stays juicy all the way through the center.
• Hot fruit and cold ice cream never get old for me. The contrast is my favorite part. Warm, caramelized pineapple, cold vanilla ice cream, and rum sauce that ends up somewhere in between. You don’t need tricks when the temperatures are right.

Ingredients

• Fresh pineapple – You want one that smells sweet at the base and feels heavy for its size. Underripe pineapple won’t caramelize the way this dessert needs it to.
• Fresh pineapple juice (reserved from the fruit) – This keeps the sauce tied to the pineapple instead of drifting into something generic.
• Dark brown sugar – Has the molasses depth that stands up to rum instead of dissolving into plain sweetness.
• Ground cinnamon – Perfect with rum and fruit.
• Sea salt – Pineapple without salt tastes unfinished to me.
• Dark rum – This is where the flavor grows up a little.
• Vanilla extract – Softens the rough edges of the rum.
• Ghee – High heat insurance that lets you grill the pineapple hard without burning the pan or the sugar.
• Butter – For the rum sauce only. This is where richness belongs.
• Vanilla ice cream – Plain on purpose, but use a good quality brand.
• Whipped cream – Optional, but very on theme.
• Maraschino cherries – This is not the moment for a fancy cherry, and you know it.
• Waffle cones, broken up (optional) – Texture and crunch if you want it.

How To Make Grilled Pineapple Sundaes

Find the complete printable recipe with measurements in the recipe card at the BOTTOM OF THE POST.

• Step One (prep the pineapple)
  Slice off the leafy top and bottom so the pineapple can stand upright on its own, then cut away the peel and any stubborn eyes. Cut the fruit into eight thick rounds, remove the tough center core from each slice, and pay attention to the juice that collects while you work. You’ll want about ⅓ cup of it later, so don’t lose track of it.
• Step Two (build the rum marinade)
  In a large bowl, whisk together the dark brown sugar, cinnamon, sea salt, vanilla extract, dark rum, and the reserved pineapple juice until the sugar loosens and everything starts to come together. Add the pineapple rings, turn them gently so they’re fully coated, and let them sit for about 15 minutes, flipping once so everything gets covered.
• Step Three (grill with ghee)
  Heat a cast iron grill pan over medium-high heat and add the ghee, and swirl it across the ridges so the pan is evenly coated. Lift the pineapple rings from the marinade, letting the excess drip back into the bowl, and set the liquid aside for later. Lay the pineapple in a single layer on the hot pan and let it cook undisturbed for 3 to 4 minutes per side, until deep grill marks form and the edges begin to caramelize. Move the rings to a plate once they’re done.
• Step Four (reduce the hot buttered rum sauce)
  Add the butter to a small saucepan over medium heat. Once it melts, pour in the reserved marinade and bring it to a gentle simmer. Let it cook for 5 to 7 minutes, stirring occasionally, until it reduces into a thick syrup that coats the back of a spoon easily.
• Step Five (assemble the sundaes)
  Place one warm pineapple ring in the bottom of a bowl, add a scoop of vanilla ice cream, then stack a second ring on top and add another scoop. Spoon the hot buttered rum sauce over everything, add whipped cream and a cherry if you’re using them, and serve right away while the pineapple is warm and the ice cream hasn’t completely melted.

Recipe Tips

• Use ghee on the grill pan, not butter. Butter burns fast on cast iron and turns bitter before the pineapple has time to caramelize. Ghee lets you push the heat, get real grill marks, and get the flavor you’re looking for.
• Cut the pineapple thick. Thin slices dry out and tear when you flip them. Thick rings hold together, caramelize at the edges, and stay juicy in the center.
• Make sure to let the excess marinade drip off before grilling. Too much liquid in the pan steams the fruit instead of searing it. You want contact with the ridges, not a puddle.
• Save the marinade and reduce it. Reducing it with butter turns it into a proper hot buttered rum sauce instead of starting from scratch.
• Warm pineapple, cold ice cream is the contrast and the payoff.
• Assemble right before serving. Grilled pineapple stays warm, but ice cream does not. This is not something to stage and wait on.

Storage & Make-Ahead

This dessert works best when the pieces stay separate until the last minute. Once it’s assembled, it’s about contrast, not longevity.

• Grilled pineapple – The pineapple rings can be grilled a day ahead and stored in an airtight container in the refrigerator. Reheat them gently in a skillet or grill pan just until warm.
• Hot buttered rum sauce – The sauce keeps well for up to 4 days refrigerated. It will firm up as it chills. Reheat it slowly over low heat or in short bursts in the microwave, stirring until smooth.
• Make-ahead strategy – If you’re serving this for guests, do all the work earlier in the day. Grill the pineapple, reduce the sauce, and put everything away. When it’s time, reheat the pineapple and sauce, scoop the ice cream, and assemble. It’s all about timing.
• What not to do – Don’t assemble this in advance. Ice cream waits for no one. This is a last-minute dessert by design.

FAQs

• Can I use canned pineapple instead of fresh?
  No, canned pineapple is already cooked and packed in syrup or juice, which means it won’t grill properly and it won’t caramelize the way you want. This recipe is all about fresh pineapple holding together under heat.
• Does it have to be dark rum?
  Dark rum works best because it holds on to the molasses notes that line up with the brown sugar and butter. Light rum would disappear here. Trust me, my dad and I tried it. If you don’t want alcohol, you can substitute apple cider or pineapple juice, but the flavor will be less nuanced.
• Why marinate the pineapple if it’s getting grilled anyway?
  The marinade isn’t about soaking the fruit. It’s about coating it so the sugar and rum caramelize evenly on the grill and give you something worth reducing into a sauce afterward.
• Can I grill the pineapple outside instead of using a grill pan?
  Yes, just make sure the grates are clean and well-oiled. You want char marks, not sticking. Medium-high heat is still the sweet spot.
• Is ghee really necessary?
  For this, yes. Butter burns too fast at grill temperatures. Ghee gives you high-heat protection and proper char without burnt butter bitterness, and the butter comes back later in the sauce where it belongs.
• What kind of ice cream works best?
  Plain vanilla, not French vanilla or vanilla bean with chunks. You want something neutral that melts nicely and doesn’t compete with the rum sauce.
• Can I skip the whipped cream and cherry?
  Yep, they’re optional. The pineapple, ice cream, and sauce are enough.

From My Kitchen Notes

Things I think about while waiting for sugar to melt.

• I’m drawn to flavors that sound wrong on paper but make immediate sense once you try them. That’s true in cooking and elsewhere, and I don’t think it’s accidental.
• Pineapple is sweet, acidic, fibrous, and unforgiving if you mishandle it. That combination keeps my attention.
• Grilled fruit is one of those things that shouldn’t work as well as it does, which is why I like it.
• I’ve never been interested in safe combinations. I’m interested in combinations that survive being questioned.
• Ghee is what happens when you finally admit butter has limits. Don’t think for one second my dad and I ever used ghee during our late-night frozen yogurt quests.
• If I ever wonder why I’ll try any ice cream flavor once, this is why. Somewhere in my brain, it’s still after midnight, the kitchen lights are too bright, and there’s a pineapple on the counter waiting to become something ridiculous.
• There’s something funny about realizing that what felt chaotic at sixteen was actually the beginning of a very specific taste memory that never went away.
• I don’t remember a single “perfect” sundae we made back then. I just remember how seriously we took it anyway.
• I appreciate how food memories attach themselves to people, not recipes or instructions.
• I don’t think my flavor combinations are random. They’re habits that survived trial, error and repetition.
• I have never apologized for my love of pineapple on pizza, and I’m starting to understand exactly where that loyalty came from.
• I once competed in an unhinged Dole Pineapple–sponsored Top Chef–style competition at a Four Seasons hotel where they handed us nothing but a whole pineapple and said go. No basket of helpful things, or safety net, just a timer, a crowd, Dole chefs watching, and shelves you were allowed to raid. The first thing I did was turn on the grill. I didn’t hesitate. I won.
• Which draws my mind to another memory: at a Ritz-Carlton in Key Biscayne, I once entered a dishwasher-loading competition on a whim, threw open the machine, loaded it like a maniac, shut the door, and somehow won that too. Apparently, I do very well when the stakes are worthless, hospitality-based, and totally absurd.
• For reasons I cannot explain, five-star hotels seem to bring out my most savage skill set. Give me a pineapple, a dishwasher, or a vague competitive premise and I will apparently focus enough to win.
• I don’t believe taste is random. It’s memory, repetition, and permission layered over time. Thanks, Dad, for never squashing my desire to push limits, even when you probably should have.

If There’s Pineapple, I’m Using It

• Pineapple Upside Down Cake – Caramelized pineapple, buttery cake.
• Pineapple Delight Cheesecake – Golden crust, pineapple mousse.
• No-Churn Pineapple Ice Cream – Creamy, tangy, freezer-ready.
• Pineapple Coconut Cream Pie – Silky filling, toasted coconut.

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Have you made these Grilled Pineapple Rum Sundaes? I’d love to hear how they turned out – leave a comment below and let me know.

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