01 -
Preheat oven to 350°F. Grease a Twinkie or mini loaf pan and set aside.
02 -
Sift together flour, baking powder, and salt in a small bowl.
03 -
Using an electric mixer, beat eggs and sugar on high speed until thick and pale, approximately 6 to 8 minutes.
04 -
Add vanilla extract to the egg mixture. Gradually fold in the sifted dry ingredients in batches, taking care not to deflate the batter.
05 -
Combine warm milk with melted butter, then gently fold into the batter until just incorporated.
06 -
Fill molds three-quarters full with batter. Bake for 12 to 15 minutes until golden and a toothpick inserted comes out clean.
07 -
Allow cakes to cool completely before removing from pans.
08 -
Beat softened butter until fluffy. Add marshmallow creme, powdered sugar, vanilla extract, and heavy cream. Beat until smooth.
09 -
Using a piping bag with a small round tip, poke three small holes in the bottom of each cake and fill with the marshmallow cream.
10 -
Serve immediately or refrigerate in an airtight container for later enjoyment.