Seafoam Nut Squares

Ingredients

• 2 c. flour
• 1/2 tsp. salt
• 1 tsp. baking powder
• 1/8 tsp. baking soda
• 1/4 c. milk
• 1/2 c. shortening
• 1/4 c. sugar
• 1/2 c. brown sugar
• 2 Tbsp. cold water
• 1/2 tsp. vanilla
• 1 pkg. chocolate bits
• 1/2 c. nuts
• 2 egg whites
• 1 1/2 c. brown sugar