Microwave Mug Cake

Step 1. Melt 100g butter in microwave

Step 2. Add 4 tbsp self raising flour,
                    4 tbsp caster sugar
                    2 tbsp cocoa powder
                    3 tbsp milk
                    1 egg
Step 3. Mix

Step 4. Put your mug in the microwave for 3-4 minutes, or until it has stopped rising.