Line an 8x8 baking dish with parchment paper.
Place a large pot on the stove over low-medium heat. add peanut butter, maple syrup, vegan butter, and cinnamon.
Whisk constantly until well incorporated.
Next add the marshmallows, and keep stirring until they begin to melt.
Once they are fully melted (takes about 7-8 minutes) and the mixture is fully incorporated, remove pot from the heat.
Add the crispy cereal and coat well.
Transfer to the baking dish and use your hands or a spatula to press down firmly so the bars are even.
Melt chocolate and drizzle on top.
Refrigerate for 30-45 min, then slice into squares and enjoy!!!