Equal sized apples are essential for apple pie in order for them to cook evenly. You don’t want a mixture of hard and mushy bits, but instead to have a perfect and evenly tender texture.
First, you’ll need to peel the apples. Then, using a sharp knife, slice one side of the apple as closely as possible to the core.
Repeat with remaining 3 sides.
For every piece of apple, hold it cut-side down and slice evenly, about 1/4-inch (1/2 cm) thick.