Ingredients:
2 1/4 cups all purpose flour
2 1/4 cups all purpose flour
1 teaspoon salt
1 teaspoon baking soda
1.5 sticks butter, melted
1 cup packed dark brown sugar
1/2 cup white sugar
1 whole egg PLUS 1 egg yolk
1.5 teaspoons vanilla extract
3/4 cup semi sweet chocolate chips
3/4 cup dark chocolate chips
Heat oven to 350 degree. Line a 9*13 with foil. Spray well with non stick spray.
Melt butter (I melt mine in the microwave...can you tell I prefer recipes with melted butter? I never think to let it soften).
Using a stand or hand mixer, combine butter, sugars, eggs and vanilla until well combined.
Sift together flour, soda and salt. Gradually add dry ingredients to wet ingredients. Once combined, fold in chips.
Bake for 20 -25 mins - you can test it with a toothpick but that doesn't work very well because you'll probably stick it in chocolate!
Let your pan cool completely, then lift out using the foil. Cut into bars.