Storing Tips. To STORE no bake peanut butter bars, place them in an airtight container and place them in the fridge for about a week. There is nothing better in the world than a dessert filled with both chocolate and peanut butter. Butter: I like salted butter in this recipe, but it's up to you. These 6 ingredient no bake Peanut Butter Bars are topped with chocolate and taste just like a Reese’s peanut butter cup. You’ll love how easy they are to make. Peanut Butter Bars AKA the best thing ever ️ If you love peanut butter and Reese’s peanut butter cups, you are going to love these homemade Peanut Butter Cups. Chocolate: I like regular semi-sweet chocolate chips, but you can use milk chocolate if you prefer that. Peanut butter: I use store-bought peanut butter for this recipe, like Skippy or Jif. They only take 10 minutes to make and taste like a homemade reese’s bar! You can eat them straight from the fridge or let them come to room temperature before you eat them. These no bake peanut butter bars are out of this world! If you only have unsalted butter, add a pinch of salt to the peanut butter mixture.