Chocolate Pinwheel Cookies - Miz En Place

Ingredients

• 1-1/2 ounces unsweetened chocolate, chopped
• 1-1/2 cups all-purpose flour
• 1/4 tsp baking powder
• 1/4 tsp salt
• 1/2 cup butter, softened to room temperature
• 1/2 cup granulated sugar
• 1 large egg
• 1 tsp vanilla extract