S'mores Cast-Iron Skillet Brownies - Witten Kitchen

Ingredients

• 1 stick of butter
• 1 ½ cup semi-sweet chocolate chips
• 2 ounces unsweetened chocolate
• 3 large eggs
• 2 tsp. instant coffee powder
• 1/2 tsp. vanilla extract
• ½ cup sugar
• ¼ cup + 1 Tbsp. AP flour
• 1 tsp. baking powder
• ¼ tsp. salt
• 2 Tbsp. butter
• 2 1/2 cups marshmallows
• 1 cup crushed up graham crackers
• 1 Tbsp. unsalted butter
• Vanilla Ice Cream, Chocolate Sauce, and crushed up graham crackers