• Preheat your oven to 350°F (175°C). Grease a Twinkie pan or mini loaf pan and set aside.
• In a small bowl, sift together the flour, baking powder, and salt.
• In a large bowl, beat the eggs and sugar with an electric mixer until the mixture becomes thick, pale, and fluffy, about 6–8 minutes.
• Add the vanilla extract and gently mix to combine.
• Fold the dry ingredients into the egg mixture in small batches, mixing gently to keep the batter light and airy.
• In a separate bowl, combine the warm milk and melted butter. Fold this mixture carefully into the batter until just incorporated.
• Fill each mold about three-quarters full with batter.
• Bake for 12–15 minutes, or until the cakes are lightly golden and a toothpick inserted in the center comes out clean.
• Allow the cakes to cool completely before removing them from the pan.

Prepare the filling

• Beat the softened butter until light and fluffy.
• Add the marshmallow creme, powdered sugar, vanilla extract, and heavy cream.
• Beat until the filling is smooth and creamy.

Fill the cakes

• Using a piping bag with a small round tip, poke three small holes into the bottom of each cake.
• Pipe the filling into the holes until the cake feels slightly heavy and filled.

Your Homemade Twinkies are ready to serve.