Preheat oven to 325 degrees F. Lightly spray a glass baking dish with oil spray.
In a bowl, mix together oats, walnuts, coconut, mushroom powder, apricots, maple sugar, and cinnamon.
In a small saucepan, add peanut butter, maple syrup, coconut oil, and vanilla extract and mix well. Simmer over medium-low heat for 1 to 2 minutes and mix well. Note: Alternatively, this can be placed in a microwave safe bowl and cooked in the microwave for 1 minute.
Pour wet mixture over dry mixture and stir together. Transfer to baking dish and press down until firmly and uniformly flattened.
Bake for 25 minutes. Allow to cool at least 15 minutes before cutting.