1 cup light corn syrup
½ cup sugar
½ cup light brown sugar
1½ cups creamy peanut butter
2 tsp vanilla extract
4 cups Rice Krispies cereal
Line a 9x13" baking pan with parchment or wax paper.
Stir corn syrup and sugars in a large saucepan over medium heat until the mixture begins to boil. Remove from heat.
Stir in peanut butter and mix well to combine. Quickly add vanilla extract and Rice Krispies before mixture cools and thickens.
Spread into lined baking pan. Cool and slice into squares.
