01 -
Preheat oven to 350°F. Lightly grease a 8 x 8-inch ceramic baking dish.
02 -
Pour soy or oat milk into a heatproof bowl and microwave for 90 seconds until warm but not boiling. Stir in 2 tablespoons of chocolate chips until completely melted and smooth.
03 -
Whisk espresso powder, ground flaxseed, cocoa powder, baking powder, salt, maple syrup, peanut or almond butter, and vanilla into the warm milk mixture until fully blended.
04 -
Fold in gluten-free rolled oats and the remaining chocolate chips until evenly distributed throughout the batter.
05 -
Transfer the mixture to the prepared baking dish and bake for 40 minutes until the oats are set and slightly firm to the touch.
06 -
Remove from oven and let cool for 20 minutes before slicing and serving.