Preheat the oven to 350°F and line a baking tray with parchment paper or a silicon baking mat.
In a bowl, add in the brown sugar and egg and whisk for 1 minute until a pale colour emerges and there are no brown sugar clumps.
1 cup brown sugar, 1 egg
Switch to a spatula. Add in peanut butter and baking powder and fold in until a soft dough forms.
1 cup creamy peanut butter, 1/2 tsp baking powder
Add in chocolate and mix.
1/2 cup chopped chocolate
Using a medium cookie scoop, scoop 2-3 tbsp per dough. Roll into balls and place onto the parchment paper. They spread a good amount so make sure to roll the balls tall and narrow. Bake six cookies at a time for 9-10 minutes.
The cookies will appear super soft in the middle when time is up. You'll know it's ready when the outside is a golden brown colour. The cookies will continue to bake on the baking tray once removed from the oven.
Allow to cool completely on the tray and enjoy!