Take frozen butter and grate 6 1/2 tablespoons into bowl using cheese grater

Whisk together flour, baking powder, sugar, and salt.

Toss some butter into flour mixture and slightly blend using fingers. Repeat adding butter.

Make a well in the center of the dry mix and add buttermilk, mix slightly.

Flour countertop and dump mixture out of bowl. Dust hands with flour and pulled dough together.

Using rolling pin shape into a rectangle, keeping about 1/2 -3/4" thick. Overlap rectangle into three folds. Then roll again with rolling pin. Repeat this step three times.

Cut biscuits and place on parchment paper in pan. Fold left over dough together again. Rolling out to 1/2 - 3/4 in thickness. (8.5x8.5 or11.5)

Brush biscuits with melted butter (1 1/2 Tbsp)

Bake at 425 for 14 minutes using shelf just over the center rack