Line a 12-well muffin tin with cupcake liners.
Mix together all the chocolate cookie crust ingredients (except the butter) in a medium bowl.
Pour the melted butter into the mixture and stir to combine.
One at a time, measure out 2 tablespoons of the chocolate crust mixture and use your fingers to press it into the bottom of each cupcake liner. Set the remaining chocolate crust mixture aside.
Place the muffin tin in the refrigerator for 20 minutes to the crust can set.
Next place the peanut butter filling ingredients in a saucepan over medium-low heat. Slowly melt the coconut oil and peanut butter stirring continuously. Once melted, remove from heat.
Take the muffin tin out of the refrigerator and use a spoon to gently add 1 tablespoon of the peanut butter mixture onto the top of each cookie layer.
Put the muffin tin back in the refrigerator for an additional 45-60 minutes until the peanut butter filling is firm.
Take the muffin tin out of the refrigerator and evenly divide the remaining chocolate cookie mix among the 12 fat bombs. Using the back of a spoon, gently press the chocolate mixture onto the top of the peanut butter filling.
Put back in the refrigerator for 20 minutes before serving.
Transfer any leftover fat bombs to a sealed container and store in the fridge for up to 7 days.