1 cup white sugar
1/4 cup butter, softened
1 tablespoon vanilla extract
2 cups all-purpose flour
2 heaping tablespoons unsweetened cocoa powder
1 teaspoon baking powder
1 pinch salt
1 cup chocolate chips
Preheat oven to 350 degrees.
Cream the sugar and butter together in a mixer until light and fluffy. Add the eggs, one at a time, and continue to beat for a few more minutes. Add the vanilla.
Whisk together the flour, cocoa, baking powder and salt and add to the mixing bowl. Mix with a fork as much as possible, then flour your hands and add the chocolate chips. Shape the dough into a ball and then into an oblong shape.
Place dough on parchment-lined baking sheet and shape until it's the length of the sheet and approximately 3 inches wide. Flatten slightly and bake for 30 minutes.
Remove from oven and cool about 10 minutes. Slice diagonally, into 1/2-inch (or wider) slices and return to the baking sheet. Bake again until the cookies lightly brown, about 20 minutes.