STEP 1: Pre-heat your oven to 375F. Bring the butter and water to a boil.

STEP 2: Dump the flour at once.

STEP 3: Blend until the dough comes unstuck from the sides.

STEP 4: Keep heating while kneading with a spoon for 3 minutes.

STEP 5: Transfer to mixer and beat so help it cool.

STEP 6: When it stops steaming, add the egg and egg white regularly.

STEP 7: At first when adding the eggs, the dough will be gummy.

STEP 9: After beating, the dough will be smooth and ready.

STEP 10: Drop on ungreased cookie sheet in heaping tablespoons. Bake at 375 for 25 minutes.

STEP 11: When the pastries have cooled, you can refrigerate them. Fill in with the room-temperature marshmallow "creme" and the blueberries just before serving; the marshmallow becomes stiff when refrigerated.

STEP 6: Looking pretty and redy to eat.