Preheat oven to 350°F (175°C) and grease an 8x8 inch baking dish.
In a large bowl, whisk together oats, protein powder, cocoa powder, baking powder, and salt.
In a separate bowl, whisk together almond milk, cold brew coffee, egg, maple syrup, and vanilla extract.
Combine the wet and dry ingredients, stirring until the mixture is uniform.
Fold in half of the chocolate chips.
Pour the mixture into the prepared baking dish and sprinkle the remaining chocolate chips on top.
Bake for 30 to 35 minutes or until the center is set and edges are slightly firm.
Let cool for 10 minutes before slicing. Can be served warm or refrigerated for a chilled summer breakfast.