2 cups + 2 TBS (11 oz) all purpose flour
2 TBS baking powder
2 TBS cocoa powder
1/2 tsp salt
1/2 cup sugar
1 tsp vanilla
6 TBS butter
1/2 cup chocolate chips
3/4 cup + 5 tsp milk, soured with lemon juice
1 egg beaten
Preheat oven to 425
Mix flour, baking powder, cocoa powder, and salt. Cut butter into flour mixture until it looks like corn meal. Stir in sugar and chocolate chips.
Add milk & vanilla and mix until just combined. Turn onto floured surface and knead until smooth.
Roll to 1" thick. Cut into 2-3" rounds or triangles. Place on baking sheet and brush with egg.
Bake for 10-12 minutes.