Bake the Cake: Prepare and bake the cake according to the package directions. Bake just until set so the cake stays very moist.
1 box vanilla cake mix
Mix the Dough: While still hot, transfer the cake into the bowl of a stand mixer. Add powdered sugar and vanilla extract. Mix on low until the mixture becomes dough-like and holds together when pressed.
1/4 cup powdered sugar, 1/2 teaspoon vanilla extract
Shape the Cakesicles: Press the dough firmly into cakesicle molds, smoothing the tops with a small spatula. Insert a popsicle stick into each one.
Freeze to Set: Place the filled molds in the freezer for 10–15 minutes. Once firm, carefully unmold by pressing gently while holding the stick. Place on a cookie sheet and return to the freezer to keep chilled while finishing the batch.
Melt the Candy Coating: Melt candy melts in a microwave or double boiler according to the package directions. Pour into a tall skinny jar for easier dipping.
12 ounces candy melts
Dip and Coat: Dip each chilled cakesicle into the melted candy. Gently shake off the excess, then place upright on a silicone mat to harden.
Decorate for Halloween: Use extra candy melt colors to add mummy stripes, monster eyes, ghost faces, or whatever spooky style you like. Add details while the coating is tacky so they stick.
Serve or Store: Enjoy immediately, or package individually in bags for gifting. Store in an airtight container at room temperature for up to 3 days.