Preheat oven to 200 degrees F. Line a cookie sheet with parchment paper, spray with cooking oil.
In a medium bowl, mix all ingredients until well blended and crumbly.
Spread mixture out evenly on the parchment paper. Place another piece of parchment paper (also sprayed with cooking oil) oil side down on top of the mixture. Use a spatula or a rolling pin to press the mixture down into a 1/4" thickness. Remove the top layer of paper and discard it.
Place in the oven and bake for 35 min or until the mixture is hot and melted (but don't let it get crispy!). Remove from oven and let cool completely.
Remove the bottom layer of parchment paper. You can use a pizza cutter if you are a neat soul to cut into squares, but from here I like to break it up into somewhat large pieces, put them into a zip freezer bag and crush into small chunks when they are needed. Store in an airtight container. These keep well, just like chocolate chips.