01 -
Preheat your oven to 375°F (190°C). Line an 8-inch square pan with parchment paper, leaving a bit extra hanging over the edges so it’s easier to lift out later.
02 -
In a bowl, mix oats, flour, cinnamon, brown sugar, baking soda, and salt. Drizzle in the melted butter and vanilla, stirring until everything comes together in a crumbly texture.
03 -
Press half your crumbly mixture tightly into the pan’s bottom, smoothing it out so it’s packed evenly.
04 -
Coat the blueberries in the sugar and cornstarch combo by tossing them together until everything’s combined. Spread this fruity layer on top of the pressed crumb base.
05 -
Sprinkle the rest of the oat mixture over the fruit, pressing gently to help it stay in place.
06 -
Bake in your preheated oven for about 35-40 minutes, or until the top is golden and the blueberry layer is bubbling. Let it completely cool down before carefully lifting it out by the parchment paper and cutting it into squares.