Buttermilk Cookie Cakes

Directions

1. 1
   Preheat oven to 350 degrees F (175 degrees C). Line a baking sheet with parchment paper.
2. 2
   Combine flour, baking soda, and salt in a bowl.
3. 3
   Combine sugar, butter, egg yolk, and vanilla extract in a separate bowl; beat with an electric mixer until creamy. Add flour mixture in 3 batches, alternating with buttermilk; beat dough well after each addition.
4. 4
   Clean beaters and beat egg white in a glass, metal, or ceramic bowl until stiff peaks form. Fold gently into the dough.
5. 5
   Drop tablespoonfuls of dough onto the prepared baking sheet.
6. 6
   Bake in the preheated oven until cookies just start to brown, 10 to 11 minutes.