As the pastry rises in the oven, the little tree branches puff into crisp, flaky edges while the pesto and mozzarella stay tucked in the middle. These savory Christmas tree bites turn two sheets of puff pastry into 24 warm, hand-held appetizers, with a shape that makes them feel special without requiring complicated decorating.
I like the balance here: basil pesto brings plenty of flavor, and a modest layer of finely shredded mozzarella melts into it without weighing down the pastry. A light egg wash helps the tops bake up glossy and golden, so the trees look as good on a platter as they taste straight from the pan. Serve them after their short rest, when the centers are warm and the pastry has had a moment to settle.
Kitchen Note
Keep the pastry cold while you cut and fill it. If the scraps or cutouts start feeling soft and stretchy, pause and chill them until they firm up; warm pastry is much harder to handle neatly.
Save these savory Christmas tree bites for a festive appetizer with flaky pastry, basil pesto, and melted mozzarella in every bite.
Why a Thin Pesto Layer Helps These Trees Stay Sealed
The filling has to stay inside a small pastry border while the layers expand in the oven. Pesto is flavorful, but it’s also oily; if it reaches the cut edges, it can interfere with the pastry sealing together. Keeping it in a thin layer with a clear border gives the top and bottom pieces room to press into one another around the filling.
There’s a similar reason to keep the mozzarella finely shredded. It spreads into an even layer instead of forming a bulky mound that pushes the pastry apart as it melts. Together, the thin pesto and fine cheese make a filling that’s easy to portion consistently across all the trees. If a little filling does escape, the bites will still bake, but the edges may not hold their crisp outline as neatly.
That even distribution also matters when you’re serving a platter. Each bite gets pesto and cheese, rather than a few having most of the filling while others are nearly empty. Take a moment to portion the filling before covering the trees, and you’ll have a much easier time keeping every shape tidy.
Puff Pastry, Pesto, and Cheese: What Each One Needs to Do
- Puff pastry — Frozen puff pastry is convenient and bakes into distinct, flaky layers once it’s thawed in the refrigerator. Use both sheets from the package, and avoid letting them become warm and limp while you work. Store-brand pastry works well; the important thing is that it’s still cold when you cut it. A different pastry dough won’t give you the same lift and crisp layers.
- Basil pesto — Jarred pesto is a practical choice here because its blended texture spreads thinly without extra prep. A brighter, fresher-tasting pesto will come through more clearly, but there’s no need to buy an expensive brand for a small baked filling. Sun-dried tomato pesto works as a direct swap in the same quantity, bringing a sweeter, tangier taste in place of the basil flavor.
- Finely shredded mozzarella — Low-moisture shredded mozzarella melts into the filling without releasing as much water as fresh mozzarella. The inexpensive pre-shredded kind is convenient and keeps the filling light. Finely shredded provolone can stand in for the mozzarella in the same quantity; it will taste a little sharper and still melt well.
- Egg wash — Beating the egg with water makes a thin coating that brushes over the tops without pooling around the edges. The egg adds the rich golden color; if you don’t have an egg, brush the tops with milk instead for a paler finish. Keep the wash on the pastry tops rather than letting it run down the cut sides.
Cut, Fill, and Bake Without Losing the Tree Shape
Set Up the Pastry and Pans
Heat the oven to 400°F and line two rimmed baking sheets with parchment paper. Unfold each sheet of pastry while it’s cold and lay it flat so the folds don’t catch under the cutter. If a fold resists opening, ease it apart rather than pulling hard and tearing the dough. Keeping the sheets on the cool side makes the cutouts cleaner and easier to lift.
Cut Matching Trees
Use a 2-inch tree-shaped cookie cutter to cut 24 trees, rerolling the scraps once if needed. Arrange 24 cutouts on the prepared baking sheets, then set the remaining 24 aside to become the tops. Press the cutter straight down for crisp outlines; twisting it can pinch the layers together and make the edges less distinct. Gather scraps gently for that single reroll instead of working them repeatedly.
Portion the Filling and Seal
Spoon 1 teaspoon of pesto onto each pastry tree on the baking sheets, spreading it thinly and leaving a 1/4-inch border. Top each with 1 teaspoon of mozzarella, then cover with the reserved pastry trees. Gently press around the edges to seal without flattening the center. If pesto touches the edges, wipe it away before sealing so the pastry can meet cleanly.
Brush, Bake, and Rest
Beat the egg and water together in a small bowl, then brush the egg wash over the tops of the trees. Bake for 14–18 minutes, switching the pans’ positions halfway through, until the pastry is puffed and golden brown. Look for lifted layers and an even golden surface rather than taking the pans out while the pastry is still pale. Let the bites rest on the baking sheets for 5 minutes before serving; they’ll be hot inside when they first come out.
Small Changes That Keep the Trees Festive
Give the Basil Pesto a Little Heat
Stir a pinch of red pepper flakes into the pesto before portioning it. The gentle heat cuts through the buttery pastry, while the mozzarella keeps the filling mellow. Keep the pesto layer thin so the added seasoning doesn’t turn into a dense pocket.
Make a Dairy-Free, Egg-Free Batch
Use vegan puff pastry, dairy-free basil pesto, and dairy-free shredded mozzarella, then brush the tops with unsweetened plant milk instead of egg wash. The filling will be less stretchy than dairy mozzarella, and the tops won’t brown as deeply, but the bites will still bake into crisp, savory little trees.
Storage and Reheating
- Refrigerator: Store cooled bites in an airtight container for up to 3 days. The pastry softens in the refrigerator, so it won’t be quite as crisp as it was fresh.
- Freezer: Freeze the baked, cooled bites in a single layer until firm, then transfer them to an airtight freezer container. Thaw them in the refrigerator before reheating.
- Reheating: Warm them in the oven until the pastry is crisp and the centers are hot. The microwave heats them quickly but softens the flaky layers.
The Questions That Come Up Before These Pastry Trees Go in the Oven
Savory Christmas Tree Bites
Ingredients
Equipment
Method
- Heat the oven to 400°F and line two rimmed baking sheets with parchment paper.
- Unfold each cold pastry sheet and cut out 24 tree shapes with a 2-inch tree-shaped cookie cutter, rerolling the scraps once if needed.
- Arrange 24 trees on the prepared baking sheets and set the remaining 24 aside.
- Spoon 1 teaspoon pesto onto each pastry tree on the baking sheets, spreading it thinly and leaving a 1/4-inch border.
- Top each tree with 1 teaspoon mozzarella.
- Cover with the remaining pastry trees and gently press the edges to seal.
- Beat the egg and water together in a small bowl, then brush the egg wash over the tops of the trees.
- Bake for 14–18 minutes, switching the pans’ positions halfway through, until the pastry is puffed and golden brown.
- Let the bites rest on the baking sheets for 5 minutes before serving.
