1. whisk egg and sugar.
2. sieve cocoa and flour together.
3. mix 1 and 2.
4. add milk and butter.
5. add chocolate chips and mix.
6. pour the mixture in a large greased mug or 2 greased ramekins.
7. cook in microwave-oven for exactly 2 minutes.
8. serve with your favorite frosting and eat hot.
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