Set your oven to 350 degrees Fahrenheit.
In a medium sized mixing bowl, mix together the maple syrup, peanut butter, and vanilla.
Add the cinnamon and oats, and mix together thoroughly.
Add the almonds and walnuts (make sure they are chopped first) and mix thoroughly.
Once evenly mixed, spread the granola onto a baking sheet that is lined with parchment paper to prevent sticking. Create an evenly distributed layer.
Bake for 25 minutes.
Remove the granola from the oven and leave it to cool. Once cooled, you can break up the granola. It will be clustered together, so you can break it up as much as you want. I like to leave some clusters, but you can break it down more so that there are no large clusters if that is your preference.
Mix in raisins after baking, if desired.