Preheat the oven to 300 F. Combine the dry ingredients from the almond flour to the sea salt into a mixing bowl. Mix well with a spoon to combine.
Next, add all the wet ingredients from the egg to the vanilla extract . Use the spoon to mix the dough into a homogenous mass. The dough will be fairly stiff.
Place the dough between two pieces of parchment paper and roll the cereal as thin as possible (about ⅛” or so). Remove the top piece of parchment paper. Using a pizza cutter or a paring knife, score the dough into small squares about ½” x ½.”
Combine the two tablespoons of granulated sweetener and ¼ tsp of cinnamon. Sprinkle this mixture evenly on top. Slip the bottom piece of parchment paper with the dough attached onto a baking sheet. Then, bake for 25-27 minutes until the dough is cooked through and brown on the edges. The dough will still be soft at this point.
Allow the dough to cool completely on the baking sheet so it will harden/crisp. Once cooled, break the cereal into pieces along the pre-scored lines. Store the cereal in an airtight container for up to three days.