1Preheat oven to 350 degrees F (175 degrees C). Line 2 cups in a muffin pan with paper liners.
2Whisk egg white and sugar together in a bowl; stir in melted butter and vanilla extract until smooth. Add flour, baking powder, and salt and mix well. Add milk and mix until smooth. Divide batter equally between 2 prepared cups in muffin pan.
3Bake in preheated oven until cake is set, 10 to 12 minutes.
Footnotes
Cook's Note:
Use a heaping 1/4 teaspoon of baking powder to get the best results.
Tip
Aluminum foil helps keep food moist, ensures it cooks evenly, keeps leftovers fresh, and makes clean-up easy.