Butternut Squash without coffee

1 large egg , preferably omega-3 egg 1 cup 1% low-fat milk , with 1 teaspoon vinegar , stirred in 1 cup butternut squash, cooked, pureed 1/2 cup Splenda brown[...]

2 1/2 cups butternut squash 1/2 cup shortening 1/4 cup margarine 1 cup sugar 1/2 cup brown sugar 2 eggs 2 teaspoons vanilla 3 cups flour 4 teaspoons baking[...]