Add the coconut butter and coconut oil to a pot. Cook over medium heat, stirring as needed, until the butter and oil are well combined.

In a food processor blend the coconut oil mix, blackberries, stevia, vanilla extract, and lemon juice. Blend until smooth.

Line a small casserole dish with parchment paper. Spread out the fat bomb mixture, then refrigerate for one hour or until hard.

Chop up into pieces. Store covered in the refrigerator.