Corned Beef Sliders Stone Mustard

The first time I made these sliders for a Sunday football gathering, my brother-in-law hovered by the oven the entire time they were baking. Something about that buttery, poppy seed aroma just pulls people into the kitchen. By the time I pulled them out golden and bubbling, I think half the room had already gathered around the counter with plates in hand.

I actually stumbled onto the sauerkraut addition by accident one evening when I was out of fresh cabbage. Now I honestly prefer it that way—the tanginess works so well with the Swiss cheese that I cannot imagine making these sliders any other way. My kids still request them without, though, so I usually do half and half.

Ingredients

• Cooked corned beef (500 g): Ask your deli counter to slice it paper-thin, which makes all the difference between tender and chewy
• Slider rolls (12): Brioche adds a lovely sweetness, but Hawaiian rolls work beautifully too
• Swiss cheese (6 slices): The nutty mildness pairs perfectly with the mustard without overpowering the beef
• Stone ground mustard (4 tbsp): Those little mustard seeds provide texture and a kick that smooth mustard just cannot match
• Shredded cabbage or sauerkraut (1 cup): Adds a necessary crunch and brightness to cut through the richness
• Unsalted butter (3 tbsp), melted: Brushing this mixture on top creates that irresistible golden, seasoned crust
• Poppy seeds (1 tsp) and garlic powder (½ tsp): This combination smells absolutely incredible while baking

Instructions

Preheat your oven to 180°C (350°F) and line a baking sheet:

This step goes quickly, so have everything ready before you start assembling

Slice the slider rolls in half horizontally:

Keep the tops together so they do not get mixed up while you work on the bottoms

Spread stone ground mustard on each bottom half:

A thin layer is all you need—the flavor is concentrated and you do not want to overwhelm the beef

Layer corned beef, Swiss cheese, and cabbage:

Pile it a little higher than you think you should because it settles during baking

Replace the tops and brush with butter mixture:

Be generous here because that buttery, seeded top is what makes these feel special

Bake covered with foil for 10 minutes, then uncovered for 3–5 minutes:

Watch closely after removing the foil because that golden perfection can turn to burned in seconds

Save

My neighbor started calling me the slider lady after I brought these to a block party last summer. Now whenever we have neighborhood gatherings, someone inevitably asks if I am bringing those little sandwiches. I never mind though because seeing how quickly they disappear is honestly the best compliment.

Making Them Ahead

You can assemble these sliders up to 24 hours in advance and store them covered in the refrigerator. Just wait to brush the butter mixture on top until right before baking, otherwise the rolls get a bit soggy. I have learned this the hard way after bringing slightly damp sliders to a potluck.

Serving Suggestions

These are substantial enough to stand alone as a meal, but I love serving them with a simple green salad dressed with vinaigrette. The acidity cuts beautifully through all that rich cheese and meat. A bowl of pickles on the side never hurts either.

Variations to Try

Sometimes I swap in Russian dressing for the mustard when I want that classic Reuben flavor profile. Rye rolls instead of plain ones add a lovely depth that really complements the corned beef. For parties, I make a double batch because they disappear faster than you would believe.

• Try adding a layer of sautéed onions if you have extra time
• A dash of hot sauce in the butter mixture wakes everything up nicely
• Leftovers reheat in a 160°C (325°F) oven for about 8 minutes

Save

There is something deeply satisfying about food that brings people together, filling the kitchen with warmth and conversation. These sliders have become part of our family story now, and I hope they find their way into yours too.

Recipe FAQs

→ What type of cheese is used in these sliders?

Swiss cheese is halved and melted over the corned beef, offering a mild, nutty flavor that complements the mustard.

→ Can I substitute the shredded cabbage with something else?

Yes, shredded sauerkraut is a great alternative that adds tanginess and texture.

→ How is the buttery topping prepared?

Melted unsalted butter is mixed with poppy seeds and garlic powder, then brushed over the slider tops before baking for added flavor and browning.

→ Is mayonnaise necessary in the sliders?

Mayonnaise is optional; it can be spread over the rolls for extra creaminess but the sliders are flavorful without it.

→ What baking temperature and time work best?

Bake the sliders covered with foil at 180°C (350°F) for 10 minutes, then uncovered for another 3-5 minutes until tops are golden and cheese melts.

→ Can I add a spicy element to these sliders?

Yes, adding horseradish cream provides a nice spicy kick that pairs well with the corned beef and mustard.