Step 1

Add sugar and cornstarch to a saucepan. Whisk together eggs and milk and add to saucepan. Heat over medium high, stirring constantly, until thickened. Remove from heat. Add vanilla extract. Let cool.

Step 2

In a large bowl, stir together powdered sugar and peanut butter until crumbly.

Step 3

Place 1/2 of crumbs into pie shell. Pour vanilla pudding over top. Cover with Cool Whip. Sprinkle remaining crumbs on top.

Step 4

Place in the fridge to cool until set, about 3 hours.