So, I didn't really measure anything. At all. But here's how I made it:
1 graham cracker crust (store-bought, 'cuz I'm lazy.)
4 oz. cream cheese or neufchatel
~1/2 C peanut butter
An amount of milk
1 package Jell-O (red or grape, preferably)
Cream together cream cheese and peanut butter, along with enough milk to make the mixture pour/spreadable, but not runny. Make sure to beat out the lumps. Spread said peanut butter/cream cheese stuff onto crust.
Prepare Jell-O according to directions, but pour carefully over peanut butter stuff to reach top of pie crust. (Careful not to destroy peanut butter layer. You may need to do some touch-up with a spoon.) Somehow, magically transfer the thing to the fridge with mad, mad ninja skills. Don't spill, whatever you do. Seriously. Who spills Jell-O all over the kitchen? Certainly not me. Refrigerate until the Jell-O sets.