Soft vanilla sponge, fluffy marshmallow creme filling and a crisp white coating with green stripes and red sprinkles. A from-scratch copycat of the Little Debbie holiday classic.
Heat the oven to 350°F (175°C). Line a half sheet pan (13 x 18 inch) with parchment and grease it lightly.
Whisk the flour, baking powder and salt. In a mixer, beat the eggs and sugar on high for 5 minutes, until pale, thick and about doubled.
Stir the melted butter and vanilla into the warm milk. Fold the flour into the eggs in two additions, then fold in the milk mixture just until smooth.
Spread the batter evenly in the pan and bake 12 to 14 minutes, until the top springs back. Cool completely.
For the filling, beat the butter and powdered sugar until fluffy, about 2 minutes. Add the marshmallow creme, vanilla and salt and beat 1 more minute.
Cut the cake in half crosswise. Spread the filling over one half, top with the other half, press gently and freeze 30 minutes.
Cut out trees with a 3 1/2 inch tree cutter, wiping it between cuts. Keep the trees cold while you melt the coating.
Melt the white candy melts with the coconut oil in 30-second bursts, stirring each time. Dip each tree, let the extra drip off and set it on a parchment-lined rack.
Melt the green candy melts, spoon into a zip bag, snip a tiny corner and pipe zig-zag stripes across each tree. Add red sprinkles right away. Chill 30 minutes until firm.
Tip: Freeze the filled cake for 30 minutes before cutting. Cold cake gives clean trees with sharp points; soft cake squishes the filling out.Tip: Wipe the cutter between cuts and keep the cut trees cold while the coating melts, so the candy melts set fast and smooth.Tip: If the candy melts are too thick for dipping, stir in a little more coconut oil, 1/2 teaspoon at a time.Scraps: mash the trimmings with a spoon of leftover filling and roll into cake balls.Chocolate version: swap 1/4 cup (25 g) of the flour for unsweetened cocoa powder.Make ahead and storage: keep in an airtight container in the fridge up to 5 days, or freeze up to 2 months. Thaw in the fridge.Nutrition is an estimate per cake.