Preheat oven to 350 degrees. Spray 2 muffin tins with cooking spray and set aside.
Whisk flours, baking soda, and salt together. Set aside.
In mixer, beat butter and sugar on med-high until pale and fluffy. Reduce speed and add eggs, one at a time, then add in vanilla. Beat until well combined.
Slowly add flour mixture and mix until just combined.
Scoop dough into muffin tins, approximately 2-3 tablespoons each. Flatten down slightly.
Bake for 10-12 minutes, or until lightly browned and center mostly set. Remove from oven and immediately.
Using a small jar, press firmly down in the center to create a well. Let pans cool for 10 minutes then place on a wire rack to cool completely.