Measure out water in a small bowl and add ground flax seed. Stir and let sit for 10 or so minutes. The mixture should thicken up and become egg-like in consistency.
In a bowl, mix all ingredients except for hot fudge. Pour into a microwave-safe mug, taking care not to fill mug more than half-way. Microwave on full power for one minute. Remove and drizzle hot fudge over top. Serve immediately.
Notes
Important: Don't grease the mug!
Nutritional information is provided as an estimate. As it can vary due to many factors (brands used, quantities, etc.), we cannot guarantee its accuracy.