In a 9-inch ovenproof skillet, melt the butter and brown sugar over medium heat until melted.
Arrange the biscuits in a single layer in the skillet over the butter and brown sugar mixture.
Scatter the blueberries over the biscuits, and then top with the streusel topping.
Bake until the biscuits are golden and a toothpick inserted in the center of a biscuit comes out clean, about 30 minutes. Allow to cool slightly and serve from the skillet.
While cooling, prepare your glaze. Mix the powdered sugar with 1 tablespoon of milk. Add more milk by a tablespoon at a time till you have the desired consistency, Drizzle over warm biscuits.