fluffy biscuits

I was in the mood to make biscuits. They ended up becoming a great after school snack. The kids loved them. GREAT recipe! Makes me think the "biscuits" in the refrigerator section aren't biscuits at all...

fluffy biscuits (allrecipes.com)
2 cups all-purpose flour
4 teaspoons baking powder
3 teaspoons sugar
1/2 teaspoon salt
1/2 cup shortening
1 egg
2/3 cup milk

In a small bowl, combine the flour, baking powder, sugar and salt. Cut in shortening until the mixture resembles coarse crumbs. Beat egg with milk; stir into dry ingredients just until moistened.
Turn onto a well-floured surface; knead 20 times. Roll to 3/4-inch thickness; cut with a floured 2-1/2-inch biscuit cutter. Place on a lightly greased baking sheet. Bake at 450 degrees F for 8-10 minutes or until golden brown. Serve warm.