In a medium sized sauce pan, heat coconut oil and chocolate chunks over low heat until melted, stirring often (around 3 - 5 minutes)

Remove from heat and stir in chopped pretzels and vanilla extract

Line an 8 X 8 baking dish with wax paper and pour the chocolate mixture in

Use a rubber spatula to spread it evenly into all the corners of the pan

Sprinkle on sea salt and top with whole pretzels, as pictured

Freeze for 1 hour, or until set

Chop into small pieces using a knife, or break with your hands

Store in an airtight container in the fridge or freezer