Add 1/4 cup chocolate chips to your mixing bowl.
Melt your butter in a small saucepan, or in the microwave, and add it to your mixing bowl.
Brew your espresso, and add it to your mixing bowl, and mix everything together until smooth.
Add sugars and mix well.
Add egg, vanilla & sourdough discard, and mix until totally combined.
Add flour, baking powder, salt, and cocoa powder, on top of wet mixture, mix everything together until flour is fully mixed in.
Fold in chocolate chips- or mini eggs!
Place in the refrigerator for 20 minutes, and preheat your oven to 375 F.
Once dough has chilled, take it out and line a baking sheet with parchment paper.
Scoop out dough into 2-3 tbsp sized portions, roll into balls and flatten them slightly.
Space them 2" apart on lined baking sheet.
Bake in oven at 375F, for 8-10 minutes.
Allow them to cool completely on the baking sheet before transferring to a cooling rack.