INGREDIENTS
1 tbsp
butter, softened or non-stick baking spray
1 1/2
cups all-purpose flour
1 1/4
cups old-fashioned oats
1
tablespoon baking powder
1/2
teaspoon kosher salt
1/4
cup granulated sugar
1/2 cup
cold butter, cut into 8 tablespoons (1 stick)
1
large egg
1/2
cup buttermilk
1
teaspoon apple cider vinegar
1
teaspoon pure vanilla extract
1
cup fresh or frozen blueberries
2 tbsp
raw sugar (optional)