If you’re searching for a crowd-pleasing party bite with a wow factor, look no further than Mini Roasted Beef and Gruyère Savory Tarts! These flaky, golden puff pastry tarts are layered with tangy Dijon, luscious caramelized onions, savory roast beef, and nutty Gruyère cheese, then finished with a bright herb kick. Whether you serve them as appetizers at your next gathering or treat your brunch guests, these little tarts deliver show-stopping flavors in every buttery mouthful.

Ingredients You’ll Need
Gathering your ingredients for Mini Roasted Beef and Gruyère Savory Tarts is as easy as it is exciting. Each component plays a crucial role, from the flaky base to the creamy spread and savory toppings, harmonizing to create the perfect bite every time.
- Puff pastry: Store-bought or homemade, this creates the irresistibly crisp, flaky shell for each tart.
- Sour cream or crème fraîche: Adds a creamy tang that balances the richness of the beef and cheese.
- Dijon mustard: Lends a gentle heat and sharpness that cuts through the butteriness of the pastry.
- Horseradish (optional): Offers an extra zing for those who love a hint of fiery flavor.
- Cooked roast beef: Thinly sliced or chopped, this is the star protein that makes each tart hearty and satisfying.
- Gruyère cheese: Shredded for easy melting, this cheese brings a nutty, mellow note that’s classic for savory bakes.
- Caramelized onions: Their sweetness balances all the savory umami layers and adds rich depth.
- Fresh thyme or rosemary: Chopped herbs bring color and a burst of brightness to every little tart.
- Salt and pepper: Just a pinch enhances all the other flavors without overwhelming them.
- Egg (for egg wash): Brushed on the pastry, this ensures a gorgeous golden, shiny finish.
How to Make Mini Roasted Beef and Gruyère Savory Tarts
Step 1: Preheat and Prepare
Start by preheating your oven to 400°F (200°C) and lining a baking sheet with parchment paper. This ensures the tarts bake evenly and lift effortlessly from the pan, keeping cleanup easy breezy.
Step 2: Roll and Cut the Puff Pastry
On a lightly floured surface, gently roll out your sheet of puff pastry to smooth any seams or rough edges. Cut the pastry into 9 equal squares or use a round cutter for a different look. Each little piece will puff up beautifully in the oven to cradle your savory toppings.
Step 3: Mix the Creamy Spread
In a small bowl, stir together the sour cream (or crème fraîche), Dijon mustard, and horseradish (if you like a touch of heat). This tangy blend forms the flavor-packed base for every one of your Mini Roasted Beef and Gruyère Savory Tarts.
Step 4: Assemble the Tarts
Spread about a teaspoon of the creamy mixture onto the center of each pastry square, leaving a border for the edges to puff. Top with a little caramelized onion, several small heaps of roast beef, a sprinkle of Gruyère cheese, and a pinch of fresh thyme or rosemary. Season lightly with salt and pepper to really bring those layers to life.
Step 5: Crimp and Egg Wash
If you want a rustic touch, fold or crimp the pastry edges up ever so slightly around the toppings. Brush all exposed pastry edges with your beaten egg to ensure an extra glossy, golden finish after baking.
Step 6: Bake to Perfection
Slide your tray into the oven and bake for 15 to 18 minutes, until the pastry is puffed and deeply golden, the cheese is melted, and the whole kitchen is filled with irresistible aromas. Allow the Mini Roasted Beef and Gruyère Savory Tarts to cool slightly before serving so you catch that ideal balance between melty cheese and crisp pastry.
How to Serve Mini Roasted Beef and Gruyère Savory Tarts

Garnishes
To make your Mini Roasted Beef and Gruyère Savory Tarts pop on the platter, finish them with a tiny sprinkle of fresh thyme leaves or parsley, and maybe an extra swirl of horseradish cream for dipping. A dusting of flaky sea salt just before serving makes every bite shine.
Side Dishes
These tarts are fabulous alongside light, leafy greens tossed with a tangy vinaigrette, or a simple shaved fennel salad. For brunch, consider pairing them with fresh fruit or a bright tomato salad to contrast the rich, savory flavors.
Creative Ways to Present
Try stacking your Mini Roasted Beef and Gruyère Savory Tarts on tiered platters for an elegant buffet, or arrange them on rustic wooden boards for a casual gathering. Skewer each tart with a decorative pick or tiny fork for mess-free cocktail hour bites!
Make Ahead and Storage
Storing Leftovers
If you find yourself with extra Mini Roasted Beef and Gruyère Savory Savory Tarts, let them cool completely before storing. Place them in an airtight container in the refrigerator for up to 3 days. This preserves the texture and robust flavors remarkably well.
Freezing
Once baked and cooled, lay the tarts out on a baking sheet and freeze until firm. Transfer to a freezer-safe bag or container, separating layers with parchment. Your Mini Roasted Beef and Gruyère Savory Tarts will keep their flavor for up to 2 months—perfect for last-minute entertaining.
Reheating
To restore that just-baked crispness, set your oven to 350°F (175°C) and heat the tarts directly on a baking sheet for 8-10 minutes if refrigerated, or 15-18 minutes from frozen. Avoid microwaving, as it softens the pastry and dulls the magic.
FAQs
Can I use another cheese besides Gruyère?
Absolutely! Swiss or Fontina cheese are excellent substitutes, each bringing a unique flavor while still melting beautifully. Play with your favorites for a twist on the classic Mini Roasted Beef and Gruyère Savory Tarts experience.
What’s the best beef to use?
Leftover roast beef works perfectly, but deli roast beef or even thinly sliced steak will all be delicious. Choose something tender and not too fatty to keep the tarts light and appealing.
How far in advance can I assemble the tarts?
You can assemble Mini Roasted Beef and Gruyère Savory Tarts up to 8 hours ahead. Keep them covered and refrigerated, then bake them just before serving for ultimate flakiness.
Can I make these vegetarian?
Try swapping the roast beef for sautéed mushrooms or roasted vegetables and add a little extra cheese. The same tart assembly method ensures a scrumptious, crowd-pleasing vegetarian bite.
Is it possible to make a larger batch for a party?
Yes! Simply double or triple the ingredients and divide them among several baking sheets. The tarts bake quickly and hold beautifully, making them ideal for big gatherings.
Final Thoughts
Bringing these Mini Roasted Beef and Gruyère Savory Tarts to your table is guaranteed to spark big smiles and maybe a few recipe requests. Friendly to baker and guest alike, these golden treats prove that a homemade, savory tart is always the life of the party. Give them a try—you’ll be amazed at how fast they disappear!
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Mini Roasted Beef and Gruyère Savory Tarts Recipe
- Total Time: 33 minutes
- Yield: 9 mini tarts 1x
- Diet: Non-Vegetarian
Description
These Mini Roasted Beef and Gruyère Savory Tarts are the perfect appetizer or brunch item. With a flaky puff pastry base topped with a savory mixture of roast beef, Gruyère cheese, caramelized onions, and fresh herbs, these tarts are sure to impress your guests. Easy to assemble and bake, they are a great addition to any gathering.
Ingredients
Puff Pastry:
- 1 sheet puff pastry, thawed
Sour Cream Mixture:
- 1/2 cup sour cream or crème fraîche
- 1 teaspoon Dijon mustard
- 1/2 teaspoon horseradish (optional)
Filling:
- 1 cup cooked roast beef, thinly sliced or chopped
- 1/2 cup shredded Gruyère cheese
- 1/4 cup caramelized onions
- 1 tablespoon chopped fresh thyme or rosemary
- Salt and pepper to taste
Egg Wash:
- 1 egg, beaten
Instructions
- Preheat the oven: Preheat the oven to 400°F (200°C) and line a baking sheet with parchment paper.
- Prepare the pastry: Roll out the puff pastry on a floured surface, cut into squares, and place on the baking sheet.
- Make the sour cream mixture: Mix sour cream, Dijon mustard, and horseradish.
- Assemble the tarts: Spread sour cream mixture on pastry, add onions, beef, cheese, and thyme. Season with salt and pepper.
- Bake: Brush with egg wash and bake for 15–18 minutes until golden.
- Serve: Let cool slightly before serving warm.
Notes
- These tarts can be assembled ahead of time and baked just before serving.
- Great as an appetizer or elegant brunch item.
- Try Swiss or Fontina cheese as a Gruyère substitute.
- Prep Time: 15 minutes
- Cook Time: 18 minutes
- Category: Appetizer, Brunch
- Method: Baking
- Cuisine: French-Inspired
Nutrition
- Serving Size: 1 tart
- Calories: 210
- Sugar: 1g
- Sodium: 220mg
- Fat: 14g
- Saturated Fat: 7g
- Unsaturated Fat: 6g
- Trans Fat: 0g
- Carbohydrates: 13g
- Fiber: 0g
- Protein: 8g
- Cholesterol: 35mg