Chocolate Chip Buttermilk Biscuits

I saw this fabulous Retro Ad for Bisquick, and I had to post it. What is missing is a recipe for Chocolate Buttermilk Biscuits. I had that covered on National Buttermilk Biscuit Day.  But what about Chocolate Chip Biscuits? See recipe below.

CHOCOLATE CHIP BISCUITS

Ingredients
3 tablespoons sugar
2 cups self-rising flour  (*see below for easy substitute)
pinch of salt
1/3 cup sweet butter
3/4 cup buttermilk
1/2 cup good quality dark chocolate chips
1/4 cup sweet butter, melted

Directions
Preheat oven to 425.
Combine flour and 1 Tbsp sugar in large bowl
Cut butter into flour mixture with pastry blender until crumbly.
Add buttermilk and chocolate chips. Stir just until dry ingredients are moistened (do not overstir). Turn dough out onto lightly floured surface. Knead 3 times.
Pat dough to 1/2-inch thickness
Cut with 2-1/4-inch round cutter.
Place biscuits on baking sheet.
Bake 15 minutes or until golden.
Take out and while still warm, quickly brush biscuits with 1/4 cup melted butter and sprinkle with sugar.

*Self Rising Flour Substitute:
In a separate container:
For each cup of all-purpose flour (level measure), add 1- 1/4 tsp baking powder and a 1/4 tsp salt. Then remeasure what you need (2 cups for this recipe)*