Nectarine blackberry crisp is a wonderful summer fruit crisp. This comforting summer dessert is topped with crunchy and buttery oat topping. Serve warm with vanilla ice cream!
Preheat oven to 375˚F. Combine nectarine slices, blackberries, sugar, cornstarch, and vanilla in a medium mixing bowl; toss well and set aside.
To make the crisp oat topping, mix together flour, oats, sugars, cinnamon, and salt in a large mixing bowl. Add the butter pieces. Using two pastry scrapers or a dough blender or your hands, work butter until the mixture comes together into small clumps. Add almond slices and toss.
Spread fruit mixture across a 2-quart baking dish, and sprinkle with the topping and almond. Bake for 45-50 minutes, until the fruit is bubbling and the topping is golden brown.
Serve the nectarine blackberry crisp warm with vanilla ice cream.