Preheat the Oven-preheat the oven to 450º F, place the cast iron skillet with 1/2 cup butter into the oven and melt the butter as the oven heats up.
Make the Biscuit Dough- in a mixing bowl, combine the 2 1/2 cups all purpose flour, 4 teaspoons baking powder, 3 tablespoons sugar, 1/2 teaspoon salt, and 1 3/4 cups buttermilk. Mix everything together until a wet dough is formed and all of the ingredients are incorporated. Fold in the 1 cup fresh blueberries softly.
Bake-spread the biscuit dough into the 10.25 inch cast iron skillet with the melted butter. Use a spatula or wooden spoon to spread the dough evenly in the pan. Use a sharp knife or pastry cutter to cut the biscuits into 10-12 slices. Then bake for 15-20 minutes, until golden brown.
Make the Icing- in a small mixing bowl, whisk together the 1 cup powdered sugar, 2 tablespoons milk and 1/2 teaspoon vanilla until smooth. Pour over the warm biscuits before serving.
Notes
Nutrition facts are just an estimate of the ingredients listed and are provided as a courtesy.
Store any leftover biscuits on the counter for up to 3 days.