Gather all your ingredients. Preheat the oven to 350 degrees F (175 degrees C). Grease an 8x8 pan with butter and line with parchment paper.
Combine rolled oats, puffed brown rice cereal, almonds, coconut, cocoa powder, salt, and cayenne in a bowl.
Combine brown sugar, maple syrup, vegetable oil, and water in a small saucepan and bring to a simmer over medium-high heat. Stir, and let the mixture boil for 1 minute.
Pour sugar mixture over the dry ingredients in the bowl and mix thoroughly.
Transfer to the prepared pan, and smooth out the top, pressing lightly with a spatula.
Bake in the preheated oven for 25 minutes. While still hot, use a spatula to score the pan into 8 portions.
Let cool to room temperature before breaking into bars. You can also not score, and simply let cool, then cut with a knife.
Serve and enjoy!