Preheat the oven to 350ºF. Line an 8x8 square baking pan with parchment paper. Assemble the base ingredients. Pour the base ingredients into the pan and press down firmly (important step!) by using the back of a metal spoon.

Place in the oven for 10 minutes. The base should be golden. Let it cool for 5 minutes before adding the filling.

Begin by removing the skins of your peaches. Next, dice the peaches until you have 3 cups. Place the peaches along with all the other ingredients into a high-speed blender or a food processor and pulse. You can keep the batter a little chunky if you want or make it smooth.

Pour the batter into a saucepan and bring to a boil to help it thicken. Let it simmer for 5 minutes and then pour onto the base that has already been baked.

Add all the topping ingredients to a bowl. Using your hands, mix the ingredients together until the oats are clumping together. Add the topping directly on top of the filling.

Place the pan into the oven for 30-35 minutes, until the oat topping is looking golden.

Take the pan out of the oven. It will resemble more of a crumble at this point. Let it cool for 15 minutes and then pop the pan into the freezer for 1-2 hours. After this, you can cut your bars and enjoy. I suggest keeping the squares in the fridge or freezer. If storing in the freezer, let thaw for 15 minutes before enjoying. These are amazing topping with vanilla ice cream!