Ingredients

• 3 eggs, separated
• 1 cup white sugar
• 1/2 cup butter, melted
• 1 (4 ounce) package Parmesan cheese, finely grated
• 3/4 cup sour cream
• 1 teaspoon baking powder
• 1 cup rice flour
• 1 tablespoon sesame seeds, or to taste

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Instructions

1. Preheat oven to 350 degrees F (175 degrees C).
2. Beat egg whites in a glass, metal, or ceramic bowl until firm, but not stiff.
3. Combine sugar and butter in a large bowl; beat with an electric mixer on high speed until creamy. Mix in egg yolks until well blended. Mix in Parmesan cheese gradually. Add sour cream and baking powder; beat until batter is smooth.
4. Sift rice flour over batter; fold in with a spatula. Fold in egg whites with the spatula.
5. Pour batter into a 9x13-inch glass baking dish. Sprinkle sesame seeds on top.
6. Bake in the preheated oven until golden brown on top and a toothpick inserted into the center comes out clean, about 38 minutes.