In a small bowl, whisk together milk, sugar, and 1 Tbsp Nutella.
Add GF flour, baking powder, cocoa powder, and salt until combined.
Whisk in melted butter.
Pour the batter into a mug that can hold 8 oz of liquid (don't make mug too big either.) Drop 1 Tbsp Nutella in the center.
Microwave for about 45 seconds to 1 minute, depending on the microwave strength.
Be careful, the cake will be very hot.
You can enjoy the cake with ice cream or whipped cream. (Note the GF ice cream brands in the post.)
Notes
Recipe from Lyuba @ willcookforsmiles.com All images and content are copyright protected. Please do not use my images without prior permission. If you want to share this recipe, please simply link back to this post for the recipe. Thank you.