Preheat the oven to 360 degrees Fahrenheit (180 degrees Celsius).
Melt the butter.
⅓ cup butter
In a bowl, mix together the melted butter, rolled oats, chopped hazelnuts, coconut sugar, and vanilla.
1 cup rolled oats, ¼ cup chopped hazelnuts, ¼ cup coconut sugar, 1 teaspoon vanilla extract, ⅓ cup butter
Spread the frozen berries evenly in a baking dish.
2 cups mixed berries
Evenly distribute the oat mixture over the berries, pressing it down with a spoon.
Bake for approximately 30 minutes or until the oat topping is golden brown.
Tips
The baking time is an estimate. Every oven is different, so the time may vary. Keep an eye on the crisp while baking.
The nutritional values provided are an estimate per serving when the crisp is divided into 8 portions.