Preheat oven to 400°.
Lightly spray a baking pan with no-stick cooking spray.

Place flour in large bowl. With pastry blender or fork, cut (blend) in shortening and butter until mixture resembles coarse crumbs.

Make a well (hole) in center of mixture. Add buttermilk, and mix until dough forms. (Dough will be a little sticky) Note: Use gloves if you don't like to touch wet dough).

Turn dough out onto a lightly floured surface. Lightly sprinkle flour over top of dough and in your hands.
Knead dough lightly for one minute. (Dust dough lightly with flour if it sticks).

Using a lightly floured rolling pin, roll dough out. Fold dough in half & repeat rolling and folding process 4 more times. Dust dough and surface area with flour as needed.

Roll dough to 1/2-inch thickness. Cut with a 2 1/2-inch floured round biscuit cutter, reshaping scraps and flouring as needed. (I used a glass)

Place biscuits in baking pan (make sure biscuits are touching) and bake at 400° for 20-22 minutes or until lightly browned. Brush tops of biscuits with melted butter.