Prepare your pan.
Line a 6-inch square baking dish with parchment paper, letting the edges overhang. This will make it super easy to lift the fudge out later.
Mix the base.
In a medium bowl, whisk the melted coconut oil and cocoa powder until smooth.
Add the almond butter and continue mixing until fully combined and glossy.
Thicken the mixture.
Stir in the coconut flour and liquid stevia. The mixture will thicken up nicely. Give it a taste and add more sweetener if you prefer.
Chill and set.
Pour the mixture into your prepared dish and spread it into an even layer.
Place in the freezer for at least 20 minutes, or until completely firm.
Slice and serve. Use the parchment paper overhangs to lift the block from the dish.
Place it on a cutting board and slice into 16 equal squares.
Don't love stevia? You can substitute it with your favorite powdered keto-friendly sweetener like erythritol or monk fruit. Start with 2 tablespoons (30 ml / 1 fl oz) and adjust to your taste.