Kringla I ⋆ Norwegian / Swedish -American heritage cookie

Ingredients

• 1/2 cup butter, at room temperature
• 1 cup granulated sugar
• 1 large egg
• 1/2 teaspoon vanilla
• 1 cup buttermilk
• 3 cups all-purpose flour
• 1 teaspoon baking powder
• 1 teaspoon baking soda
• pinch of salt