3/4 cup and 2 tablespoons sugar
1/4 cup milk
1/4 cup butter
2 tablespoons unsweetened cocoa powder
1/4 cup smooth peanut butter
1-1/2 cups rolled oats
1/2 cups Rice Krispies
1/2 teaspoon vanilla
Combine sugar, milk, butter and cocoa in a pot over medium high heat. Whisk until it's smooth and starts to boil. Cook for 1 1/2 minutes.
Remove from the heat and stir in peanut butter until well mixed. Stir in oats, cereal and vanilla.
Spread onto a parchment lined pan and allow to firm up. Add sprinkles immediately after spreading if you want to get fancy. It won't take long to set. Cut them into squares with a sharp knife.
Adapted from allrecipes.com. I made 1/2 a batch. It was plenty.