Mini Beef Wellingtons

The first thing I watch is the pastry: it should rise into crisp, golden layers while the beef finishes gently inside. Mini Beef Wellingtons make that timing especially important because…

By Ava
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November 14, 2026
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Reading time: 9 min

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The first thing I watch is the pastry: it should rise into crisp, golden layers while the beef finishes gently inside. Mini Beef Wellingtons make that timing especially important because each portion is small, and a browned top doesn’t tell you whether the center has reached the right temperature. I use an instant-read thermometer rather than guessing from the pastry alone.

Each tenderloin medallion gets a quick sear, a swipe of Dijon, and a snug wrap with prosciutto and browned mushrooms before it goes into cold puff pastry. That layered approach gives you the rich, savory center people expect from Wellington without wrestling with one large roast. Keep the filling cool as you assemble, and you’ll have neat little parcels with flaky pastry around tender beef.

Mini Beef Wellingtons with golden puff pastry

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Kitchen Note

Brush on the egg wash in a thin, even coat, including the pastry around the folds. A heavy puddle at the seams can bake into a slick patch instead of an even golden finish.

Save these Mini Beef Wellingtons for a dinner-party centerpiece: flaky pastry, savory mushrooms, and tender beef in every portion.

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Why These Mini Wellingtons Need a Thermometer, Not a Guess

A whole beef Wellington gives you a larger center to monitor; these individual parcels don’t offer that same margin. The pastry can look ready before the beef is, or the beef can reach its target while a thicker fold of pastry still needs a little color. That’s why I treat the visual cue and the temperature as two separate checks: golden, puffed pastry tells me the outside is baked, and the thermometer tells me the beef is ready.

For this version, the center of each medallion needs to reach 145°F. Insert an instant-read thermometer through the side of the pastry into the middle of the beef, rather than stopping in the mushroom layer. If one parcel reaches temperature before another, take that one out and let the rest continue; the medallions and pastry folds won’t always be perfectly identical. A three-minute rest gives the centers a moment to settle before serving.

What Each Wellington Layer Brings to the Table

Beef tenderloin — Its tenderness suits the short sear and oven bake, so each small Wellington stays easy to cut. Ask for a well-trimmed piece if you want to save prep time; cut the medallions evenly so they cook at a similar pace.
Cremini mushrooms — They bring a deeper, earthier taste than mild white mushrooms, but ordinary grocery-store cremini are just right here. Chop them finely so the mixture spreads in a thin layer and wraps neatly around the beef.
Shallot and fresh thyme — Shallot gives the mushroom mixture a gentle allium flavor without large pieces interrupting the wrap, while fresh thyme keeps it savory and herbal. If fresh thyme isn’t available, use one-third as much dried thyme.
Dijon mustard — Its sharp tang cuts through the beef and buttery pastry. A standard jar works well; brush it directly onto the cooled medallions so it stays where it belongs instead of mixing into the mushroom filling.
Prosciutto — Thin slices bend around the medallions and hold the mushroom mixture close to the beef. Deli-counter slices are fine; ask for them thin enough to wrap without tearing.
Frozen puff pastry — Store-brand pastry works, and the important detail is its condition: thaw it, but keep it cold while you assemble. Cold pastry is easier to shape than warm, sticky sheets.
Egg and water — Beating them together makes the wash easy to brush over the pastry for a glossy, browned finish. Use a large egg, as listed, rather than a smaller one that may leave you short on wash.

From Quick Sear to Crisp Pastry: The Four Stages

Sear the Medallions in Two Batches

Heat the oven to 400°F and line a rimmed baking sheet with parchment. Pat the beef dry, season it with 1 teaspoon of the kosher salt and 1/4 teaspoon of the black pepper, then heat the neutral oil in a 12-inch skillet over medium-high heat. Sear the medallions in two batches for about 1 minute per side, just until browned, and transfer them to a plate to cool. Crowding the skillet makes it harder to brown the surfaces evenly.

Cook the Mushroom Mixture Until Dry

Reduce the skillet heat to medium and melt the butter. Add the finely chopped mushrooms, shallot, thyme, remaining 1/2 teaspoon salt, and remaining 1/4 teaspoon pepper. Cook for 10–15 minutes, stirring often, until the mixture is deeply browned and no liquid remains, then cool it completely. Brush the cooled beef medallions with Dijon mustard.

Wrap the Beef Before Enclosing It in Pastry

Lay out the prosciutto slices and divide the cooled mushroom mixture among them, spreading it in a thin layer. Set one beef medallion on each slice and wrap the prosciutto around it. Cut each puff pastry sheet into 4 squares, then place one wrapped medallion in the center of each square. Bring the pastry up around the beef and pinch the seams closed underneath.

Bake Until the Pastry Is Golden and the Beef Is Ready

Arrange the parcels seam-side down on the prepared baking sheet. Beat the egg with the water and brush the mixture over the pastry, then bake for 18–25 minutes. Look for puffed, golden pastry, and check that the center of each beef medallion reaches 145°F on an instant-read thermometer. Rest the Wellingtons for 3 minutes before serving.

Easy Swaps for Mini Beef Wellingtons

Use white button mushrooms

Replace the cremini mushrooms with the same amount of finely chopped white button mushrooms. The filling will taste milder, but it still works well as long as you cook it until deeply browned with no liquid left.

Trade thyme for rosemary

Use 1 teaspoon of finely chopped fresh rosemary in place of the fresh thyme. Rosemary makes the mushroom filling more piney and assertive, so chop it small to spread the flavor evenly.

Make them gluten-free

Use gluten-free puff pastry in place of regular puff pastry, choosing sheets large enough to wrap the medallions. Gluten-free pastry can be more fragile to handle, so work while it’s cold and check the beef temperature as well as the pastry color.

Storage and Reheating

Refrigerator: Store cooked Wellingtons in an airtight container for 3–4 days. The pastry softens as it sits.
Freezer: Freeze cooled, baked portions individually, then transfer them to an airtight freezer container for up to 2 months. Thaw in the refrigerator before reheating; the pastry may be less crisp than freshly baked.
Reheating: Warm in a 350°F oven until the center reaches 165°F. The microwave heats the beef, but it leaves the pastry soft.

Questions I Get Asked About Mini Beef Wellingtons

Can I prepare the components ahead of time?+

Yes. Cook the beef and mushroom mixture, cool them, and refrigerate them separately in covered containers for up to 1 day. Assemble with the cold pastry shortly before baking so the parcels are easier to handle.

Can I use a different cut of beef?+

Tenderloin is the best fit for these quick-cooking individual parcels. A tougher cut may not become tender in the same bake time, and changing the cut can make the portions cook unevenly.

Can I freeze the Wellingtons before baking?+

I don’t recommend freezing them unbaked. The mushroom filling can release moisture as the parcels thaw, which may soften the pastry before it goes into the oven; bake them after assembly or freeze portions after baking instead.

Can I use dried thyme instead of fresh?+

Yes. Use one-third as much dried thyme as fresh, and stir it into the mushroom mixture with the other seasonings. Dried thyme has a more concentrated, earthy flavor than fresh leaves.