Preheat oven to 350F. Grease an 8×8 pan (or a smaller pan, if you want thicker brownies). In the bowl of a food processor, combine all ingredients for brownies. Blend until completely incorporated with no oat or date chunks. Pour into prepared pan and spread into an even layer. Bake in preheated oven for 15 minutes (baking time may change if you use a different pan), until a toothpick comes out clean. Once brownies are done, remove from oven and let cool.