- Preheat the oven at a temperature of 350?F. Take 13x9x2-inch baking pan; spray and then heat. Put together the butter, an egg and cake mix in a mixing bowl until stiff dough forms. Place the dough at the bottom of the pan and press evenly.
- Place the pan in the oven and bake for 15 minutes until lightly brown. Now mix together the corn syrup, 2 eggs, egg whites, brown sugar and vanilla. Then add the pecans, stir. Ladle the egg mixture over the baked crust and then further bake for 20 minutes until filling is set.
- Cut into squares and serve Chewy Pecan Squares Recipe at once.