S'mores Brownie Skillet

Name: S'mores Brownie Skillet
Prep time: 10 min
Cook time: 20 min
Total time: 30 min
Cuisine: American
Ingredients: 2 sheets honey graham cracker; 1 cup marshmallows; 1 egg; ½ cup light brown sugar; ½ cup mini chocolate chips; ¼ cup + 2 tbsp all purpose flour; ¼ cup Greek yogurt; ¼ cup white sugar; ¼ cup cocoa powder; 2 tbsp nut milk; 1 tsp vanilla extract; ½ tsp baking powder; pinch of salt; butter or oil