These sliders feature thinly sliced corned beef layered with Swiss cheese and tangy mustard-mayo spread on soft slider buns. Topped with pickles and optional red onion, they're brushed with melted butter and sprinkled with poppy seeds before baking to a golden finish. Perfect for quick appetizers or casual gatherings, they balance savory flavors and tender textures. Easily customizable with cheddar or provolone and ideal for pairing with a crisp lager or light wine.
My brother showed up at my door last Sunday with three pounds of corned beef and a challenge to use it before his dinner party that evening. We stood in my tiny kitchen, arguing over whether sliders felt too casual for his fancy friends, until I started slicing buns and the whole apartment filled with that unmistakable savory smell that makes everyone hungry.
Last New Years Eve, I made four dozen of these for a crowd that kept drifting into the kitchen to watch them come out of the oven. Someone actually cheered when the cheese started bubbling through the buns.
Ingredients
- 12 slider buns: Brioche adds a subtle sweetness that balances the salty corned beef beautifully
- 400 g cooked corned beef: Ask your deli counter to slice it paper thin, it makes all the difference in texture
- 12 slices Swiss cheese: Cheddar works too but Swiss melts into those gorgeous puddles that everyone fights over
- 3 tbsp mustard and mayonnaise: Mix these together before spreading for an even tangy layer on every bun
- 12 dill pickle slices: Do not skip these, they cut through the richness like magic
- 2 tbsp melted butter: Brush this generously on the tops for that golden crunch that makes people grab seconds
Instructions
- Get your oven ready:
- Preheat to 180°C and line a baking sheet with parchment paper to save yourself cleanup time later
- Prep the bun bottoms:
- Slice the buns in half and arrange the bottom pieces on your prepared baking sheet like a neat little army
- Spread the base layer:
- Smear each bottom bun with a thin layer of mayonnaise and mustard mixed together
- Build the layers:
- Pile on the sliced corned beef, tuck a cheese slice over each one, then crown with a pickle and onion if you are using them
- Top and brush:
- Place the bun tops on, then brush each one generously with melted butter and sprinkle with poppy seeds
- Bake until golden:
- Cover loosely with foil and bake 10 minutes, then uncover and bake 5 more minutes until the cheese is melted and buns are golden
My friend Sarah still talks about the time I accidentally bought regular sized buns and made sandwich sized versions instead. We ate them like sloppy sandwiches on the couch and honestly, they were just as good.
Make Ahead Magic
Assemble these completely up to 4 hours before baking, cover tightly with foil, and keep them in the refrigerator. Add the melted butter topping just before they go in the oven.
The Perfect Cheese Pull
Slice your cheese slightly larger than the buns so it oozes over the edges while baking. Those crispy cheese edges are what people remember most.
Serving Strategy
Set up a little station with extra mustard, pickles, and napkins because these can get gloriously messy.
- Use a sharp serrated knife to cut them apart without squishing the tops
- Stack them on a wooden board for that rustic party look
- Keep them warm in a 150°C oven if people are grazing
Watch how fast these disappear and you will understand why they are my go to for every gathering now.
Recipe Questions & Answers
- → What type of cheese works best for these sliders?
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Swiss cheese is traditional for its mild nutty flavor, but cheddar or provolone are great alternatives that melt well.
- → Can I prepare these sliders ahead of time?
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Yes, assemble and refrigerate them for a few hours before baking to maintain freshness and flavor.
- → What’s the best way to keep the buns soft after baking?
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Brushing the tops with melted butter before baking helps keep buns moist and adds a rich finish.
- → Are there any suggested condiments to enhance the flavor?
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A combination of mayonnaise and Dijon mustard adds creamy tanginess, while pickles give a pleasant crunch and acidity.
- → How can I add a twist to these sliders?
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Try adding sauerkraut for a Reuben-style variation or swap cheeses for different flavor profiles.