Preheat oven to 350 degrees F.
Brush the baking pan with butter and layer it with a baking sheet paper.
Mix the butter, sugar, and vanilla in a bowl until evenly mixed. Then add the egg and blend it well.
In a bowl, mix the flour, baking soda, and salt, then add this to the butter mixture. Mix until smoothened.
Pour the mixture into a baking pan, then bake it for 15 minutes.
After 15 minutes, sprinkle it with chocolate chips on top, then slice the brownie brittle and transfer on a plate.
Serve and enjoy!