In a stovetop pan over medium melt almond butter, honey and vanilla extract, stirring occasionally.
Remove from heat and stir in cheerios.
Pour mixture into an 8 x 11 inch pan and press down firmly so the mixture is evenly spread out.
Meanwhile, in a double boiler (or stove top pan with water and small glass or stainless steel bowl placed on top) add chocolate chips and coconut oil and stir together until melted.
Drizzle dark chocolate sauce over cereal bars, cover and place in the freezer to set for at least one hour.
Slice into bars and enjoy!
Keep stored in the freezer.