Preheat the oven to 350°F (180°C).
In a bowl, cream together the butter and sugar for 1 minute. I usually do this with a stand mixer or an electric hand mixer.
½ cup (111g) salted butter, softened, ½ cup (115g) granulated sugar
Add in the eggs and vanilla. Once combined, add in the cake mix and flour. Mix until a soft dough forms. Fold in the white sprinkles.
2 eggs, 1 tsp vanilla extract, 1 (15.5 oz) box red velvet cake mix, ¾ cup (114g) all-purpose flour, 1/2 cup white sprinkles
Divide the dough into 3 Tbsp portions and arrange on a parchment or silicone lined cookie sheet.
Bake for 9-11 minutes or until the cookies spread slightly and no longer look wet. Allow to cool on the pan for 3-5 minutes before transferring to a wire cooling rack. Enjoy!