Combine the protein brownie mix and water in a mug and whisk together until completely mixed and no lumps remain. Optional: add a few mini chocolate chips on top.
Microwave for about 1 minute, or until the brownie rises and the top of the brownie is no longer raw or wet. KEEP AN EYE ON THE BROWNIE IN THE MICROWAVE to make sure it does not overflow. Do not overcook.
Let cool for a minute. Sprinkle with powdered sugar on top if you like, and dig in with a fork or spoon!
Notes
→ Wash and dry the plastic scoop thoroughly before placing back into the brownie mix container. → Use a mug that is at least 6 oz to make sure the brownie batter doesn't overflow as it expands. 8 oz is better. You can also use a microwave-safe bowl or ramekin that is 6+ oz. DO NOT TAKE YOUR EYES OFF THE MICROWAVE if you're using a small mug. If you see the brownie starting to overflow, just open the microwave door, wait a few seconds for it to deflate a little, then continue microwaving. → Microwave strengths vary. My microwave is 1000 watts, I use the high power setting, and the brownie is consistently perfectly baked after 1 minute. Your brownie might be done as early as ~45-50 seconds or might take as long as 1:30. Do NOT overcook it or it will be dry and crumbly. → Any chocolate chips you add at the beginning will mostly sink during cooking. If you want some chocolate chips on top, just pause the microwave at 30 seconds, add a few chips on top, then continue microwaving.