Step 1

First, preheat oven to 350 degrees Fahrenheit. Line a baking sheet with parchment paper.

Step 2

In the bowl of a stand mixer, add cold butter and sugar. Mix on high for 2 to 3 minutes or until fluffy. There should be no clumps of butter remaining.

Step 3

Then, add in egg, egg yolk and vanilla. Stir to combine.

Step 4

Add all remaining ingredients. Stir to combine.

Step 5

Then, use a cookie scoop to scoop balls of dough onto lined pan. Use hands to slightly flatten each ball of dough.

Step 6

Bake for 10 to 12 minutes or until cookies are lightly golden around the edges.

Step 7

Finally, remove from oven. Allow cookies to cool on pan for 10 minutes before carefully removing to a cooling rack.