Gluten-free Mug Brownie by S Keys Gluten-free Mug Brownie1/4 cup gluten-free oat flour, quinoa flour, or a gluten-free flour blend 1/4 cup packed brown sugar 2 Tbsp unsweetened cocoa powder Pinch salt 2 Tbsp canola or other mild vegetable oil 2 Tbsp milk, coffee or waterMicrowave on high for a minute, checking it after 30 seconds (microwaves vary) — it will be done when it’s springy on top but still a bit gooey — like the very best brownie. Eat warm.