Instructions

  1. Pre-heat oven to 325 degrees.
  2. Beat butter, sugars, egg yolks, and 1 teaspoon vanilla until soft and creamy. Mix dry ingredients together and add into the butter-sugar bowl along with the milk. Spread evenly into 9"x13" pan. Sprinkle with a laer chocolate chips.
  3. Beat egg whites to soft peaks, beat in brown or white sugar and vanilla. (Brown sugar yields a slightly more tawny flavor.) Fold in nuts (if using) and spread over the chocolate chips.
  4. Bake 30-35 minutes.
  5. Remove from the oven and allow to cool completely before cutting and serving.