First, start by lining a 9x9" baking pan with wax paper or parchment paper. You want to cover the pan enough so that there is overhang on the edges of the baking pan. This will ensure that the trail mix energy bars don't stick to the baking pan at all!
In a large bowl, add in the trail mix, old fashioned oats, all bran and chia seeds. Lightly toss to combine.
In a small bowl, add in the peanut butter, honey, coconut oil, vanilla extract, salt and cinnamon. Microwave for 30-60 seconds or until the honey is bubbling/foamy. Stir to combine.
Pour the melted peanut butter and coconut mixture over the dry ingredients and stir using a rubber spatula.
Once the dry mixture is coated with the wet mixture, transfer it to the lined baking sheet. You can now flatten this with a rubber spatula or top the mix with another piece of wax paper and flatten it all up using your hands. This way your hands stay lean and you will get a perfectly flat top.
Refrigerate for 2-3 hours or overnight before cutting into it. Use a serrated knife ( I used my bread knife) and gently make bake and fourth motions to cut into the bars. I cute mine into 18 bars.
Store these bars in an airtight container in the fridge for up to a week!