Preheat oven to 325 degrees. Line baking sheet with parchment paper.
Cut butter into small squares and add to the bowl of a stand mixer.
Add both the ¼ cup and 2 tbsps of icing sugar. Beat until fluffy. About 2 minutes.
Add the vanilla extract and beat until combined.
Continue to beat as you add the flour a ¼ cup at a time.
Beat until the dough starts to pull together.
Add mini chocolate chips and mix until combined.
Remove dough and shape into one large ball.
Pinch or scoop off 1tbsp of dough and roll into a ball.
Using the bottom of a cup, flatten the dough ball.
Bake for 20-22 minutes or until edges begin to brown.
Allow to cool on the baking sheet.
Store in an airtight container.