Preheat oven to 400°F and place butter in the baking dish to melt in the oven.
In a medium bowl, mix flour, sugar, baking powder, and salt.
Stir in buttermilk until a sticky dough forms.
Gently fold in blueberries and lemon zest.
Remove baking dish from oven and tilt to coat with melted butter.
Pour biscuit dough into the dish and spread evenly.
Bake for 30–35 minutes, until golden brown.
In a small bowl, mix powdered sugar with lemon juice until smooth.
Drizzle glaze over the warm biscuits and serve.
Notes
Nutritional information is estimated and provided as a general guideline only. Values may vary depending on the specific brands of ingredients used, portion sizes, and preparation methods.