Bake the cake according to the directions on the box. Our favorite boxed cake is King Arthur and it's actually gluten-free, but taste AMAZING!
Bake the cake in a 5x2 round pan. You will need 3 layers so bake 3 times or if you have 3 pans you can bake all at once.
Grease the pan really well and add parchment paper to the bottom. Cut it to the circle size of the pan.
Bake the cake according to the box. It will most likely take less time since it's a smaller cake, so check on it often.
Once all three cakes are baked and cooled, stack them with frosting in between each layer.
Make the buttercream frosting while the cakes are baking.
Melt both bags of candy melts in a bowl in the microwave for 1 to 2 minutes. Stir with a spoon until they're all melted. If you need more time, you can microwave for 20 seconds at a time. You don't want the candy melts to burn or the texture will be too thick.
Pour the melted candy melts into a piping bag with a small hole cut at the bottom.
Drip the candy melts over the cake from the top to the bottom like wax would fall from a candle.
Let each layer dry before adding another layer of candy melts over the previous layer.
You want it to look very drippy and layer the candy melts on over the frosting for a melty candle look!
Add either a tealight or a candle in the center of the cake and light it.