Make the crust by mixing the graham cracker or cookie crumbs with the melted butter or coconut oil in a bowl, then press the mixture into the bottom of the prepared pan. Bake the crust for 10 minutes.

While the crust bakes, make the filling by adding all filling ingredients to a blender and blending until smooth. Pour the filling over the crust, then bake for 25–30 minutes, or until the bars are just set in the middle. (See Notes below on how to bake in a water bath to avoid any cracks.)

Remove the bars from the oven and let them cool at room temperature for 1 hour, then transfer them to the fridge to chill for at least 3 hours (or overnight).

Once the bars have chilled, remove them from the pan and cut into squares. Enjoy right away, or store in an airtight container in the fridge for up to 5 days!