Ingredients
Equipment
Method
Make the cake
- Heat the oven to 350°F. Spray two 9x13-inch metal baking pans with nonstick cooking spray, line the bottoms with parchment paper, and spray the parchment.
- Whisk the flour, baking powder, and salt in a medium bowl.
- Beat 3/4 cup of the butter and the granulated sugar in a large bowl with an electric mixer on medium-high speed until light and fluffy, 2 to 3 minutes.
- Beat in the eggs one at a time, then beat in 2 teaspoons of the vanilla.
- Add the flour mixture in three additions, alternating with the milk in two additions and beginning and ending with the flour; mix on low just until combined.
- Divide the batter evenly between the pans and spread into thin, even layers.
- Bake side by side for 12 to 15 minutes, until the tops spring back when lightly touched and the edges are just beginning to turn golden.
- Cool in the pans for 10 minutes, then lift the cakes out by the parchment and peel off the parchment.
- Cool the cakes completely on racks.
- Cover the cooled cake sheets and refrigerate for 30 minutes to firm them.
Make the filling
- Beat the remaining 1/4 cup butter with the marshmallow creme, powdered sugar, and remaining 1/2 teaspoon vanilla until smooth and spreadable.
Assemble the cakes
- Use a 3-inch-tall tree-shaped cookie cutter to cut 12 trees from each cake sheet, arranging the cuts closely together.
- Spread the filling evenly over 12 trees, leaving a narrow border, then top with the remaining trees and press gently to make sandwiches.
- Arrange the cakes on a parchment-lined baking sheet and refrigerate for 20 minutes to firm the filling.
Coat and decorate
- Melt the white candy melts and shortening in a deep, microwave-safe bowl at 50% power in 30-second intervals, stirring between intervals, until smooth.
- Let the coating stand for 5 minutes, then dip the cakes one at a time, letting excess coating drip back into the bowl before returning each cake to the baking sheet.
- Let the coating set for about 20 minutes.
- Melt the green and red candy melts separately in microwave-safe bowls in 15-second intervals, stirring between intervals.
- Transfer each color to a small piping bag or resealable bag and snip a tiny corner.
- Pipe green zigzags and red dots over the cakes and let set for 10 minutes.
Notes
For clean cuts, arrange the tree-shaped cuts closely together on the chilled cake sheets. Store covered in the refrigerator for up to 3 days; freeze yes, in an airtight container. For a gluten-free variation, use a cup-for-cup gluten-free flour blend.
