Sweet Blueberry Biscuits

Ingredients :
Biscuits:

2 cups All-Purpose Flour (I used White Lily, a flour available in most Southern stores)
1 Tb. baking powder
1 1/2 tsp salt
3 Tb. sugar
1 stick unsalted butter (VERY cold)
3/4-ish cup buttermilk (use enough until the dough is just barely wet enough)
1 c. frozen blueberries (we used fresh blueberries that had been frozen overnight)
1/2 stick melted salted butter
Sauce:

1 c. powdered sugar
3 Tb. milk (or more if not thin enough)
1/2 tsp. vanilla

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