CAKE:
In a medium bowl whisk melted butter and sugar until well mixed
Add eggs one at a time, and then stir in vanilla
In a large bowl, whisk flour, sugar, baking powder, salt, and nutmeg in a bowl.
Add wet ingredients to the dry ingredients
Spoon batter into muffin tins with paper liners. Bake in the oven for 18-20 minutes. Remove and allow to cool for 10 minutes
Use a piping tip or a small sharp knife to carve out a small hole in the middle of the cupcake, and put the remove pieces of cake aside. After adding the jelly, you'll put these pieces back on top of the hole.
ASSEMBLING YOUR CUPCAKES:
Place jelly into a small pastry bag. You can also use a small ziplock bag and cut off the corner
Using the piping bag insert jelly into the middle of the cupcake, and then cover with the piece of cupcake you removed to seal up the top.
Sprinkle powdered sugar over the top