Stir together the chocolate chips and butter in a microwave-safe bowl. Cook in the microwave on high for one minute, until butter is melted; stir until blended.
Stir in the sugar and flour.
Add the egg and stir until combined.
Split the batter between 2 buttered ramekins.
Bake at 400 F for 20 minutes.
Serve immediately.
Recipe by Mandy's Recipe Box at https://mandysrecipeboxblog.com/easy-brownie-recipe-2/