Step 1

Using a hand mixer, beat the egg whites in a large bowl until foamy. Add the cream of tartar and continue beating until soft peaks form.

Step 2

In a medium bowl, beat the egg yolks with a hand mixer. Add the sugar a bit at a time and beat until thickened. Add the yolk mixture to the egg whites.

Step 3

Sift the cake flour, all-purpose flour, salt, and baking powder and add to the egg whites. Gently fold until fully combined.

Step 4

Add the butter and milk to a bowl or glass measuring cup and microwave for 20 seconds, or until the butter melts completely. Add the butter mixture and the vanilla to the batter and gently mix.

Step 5

If you have the Twinkie machine, you can simply pour in the batter and follow the machine’s instructions.

Step 6

If you’re not using the Twinkie machine to bake your Twinkies, preheat the oven at 350ºF (180ºC).

Step 7

If you are using DIY molds, grab a sheet of tin foil, fold it in half, then in half again, and, using a small container or other Twinkie-shaped item, mold the foil into an oblong shape. Trim the excess foil around the edges. Repeat to make 8-10 molds total.

Step 8

Fill the molds halfways and bake for 15 minutes, or until a toothpick inserted in the middle of the cake comes out clean.

Step 9

If you are using a Twinkie baking pan, fill each indent halfway and bake for about 13 minutes, or until a toothpick inserted in the middle of a cake comes out clean. Let the cakes cool down.

Step 10

To make the filling, mix the marshmallow fluff and milk in a large bowl. Microwave for 20 seconds, then set aside to cool.

Step 11

Once the cakes are done, let cool. Fill a pastry bag with the filling. Use the tip to make 3 small holes in each cake, and squeeze in the filling.

Step 12

Enjoy!