Place the chocolate chips into a microwave-safe mug and microwave on high until it melts (approx. 30 seconds - make sure it doesn't burn).Add the almond flour, baking soda, coconut oil, and egg to the mug and mix well with a fork. Push the mixture down to the bottom of the mug.Microwave on high for 90 seconds (this time may vary depending on the microwave oven).Let cool for a minute and enjoy.