01 -
Preheat oven to 350°F (175°C) and grease an 8-in x 8-in ceramic baking dish. Warm milk in a microwave-safe bowl for 1 minute 30 seconds, ensuring it does not boil.
02 -
Add 2 tablespoons of chocolate chips to the warm milk and whisk until the chocolate is fully melted.
03 -
To the milk mixture, add espresso powder, ground flaxseed, cocoa powder, baking powder, and salt. Whisk well to combine.
04 -
Stir maple syrup, peanut butter, and vanilla extract into the milk mixture until smooth.
05 -
Fold gluten-free rolled oats and the remaining chocolate chips into the batter.
06 -
Transfer the batter into the prepared baking dish and bake for 40 minutes. Allow to cool for 20 minutes before slicing and serving.