Prepare the pan. Line an 8×8 or 9×9 baking pan with parchment paper for easy removal of the granola bars after chilling. Set this aside.
Optional toasting. Preheat the oven to 350°F/170°C and line a baking tray with parchment paper. Toast the rolled oats for 10 minutes. Let cool completely before moving forward in the recipe.
Mix the dry ingredients. In a large bowl, stir together the rolled oats, rice crispy cereal, mini chocolate chips, salt, and cinnamon.
Mix the wet ingredients. To the dry ingredients, add the sunflower seed butter, maple syrup, and vanilla extract. Mix this together until no dry ingredients remain.
Press and chill. Using the back of a spoon or spatula, press the granola bar mixture into the prepared baking pan. Chill for 1 hour at least but overnight is preferred.
Slice and serve. Using a sharp knife, cut into either 12 bars, or 9 or 16 squares. Enjoy!