Preheat the oven to 400℉. Butter the inside of a 9x13-inch baking dish; set aside.
Heat a medium saucepan over medium-high heat and spray with olive oil spray. Add peaches, brown sugar, cornstarch, vanilla extract, cinnamon, and salt. Stir to combine and cook for about 10 minutes. Frozen fruit may take longer to cook.
When the mixture starts to bubble, reduce the heat to low and simmer the filling for another 5 minutes until the peaches start to soften and the sauce thickens.
White the peaches cook, prepare the streusel. In a medium bowl, use your fingers or a pastry cutter to combine softened butter, butter, flour, sugar, cinnamon and salt. Mix until you achieve a crumbly consistency.
Add the cooked peaches to the prepared baking dish, using a spatula to spread them into an even layer. Sprinkle the crumble topping over the filling in an even layer.
Bake in preheated 400 degrees F oven for 15-20 minutes, or until the filling bubbles and the top is lightly browned and crispy.
Remove from the oven and let the dessert cool for a few minutes before serving.
Video
Notes
Add more fruit - You can always add in other fruits with peaches to jazz things up. For example, cherries, apples, blueberries, and blackberries are all great choices.
Use canned pie filling - Don’t have time to whip up your own fruit filling? Canned will work just as well, although the flavor will be a little muted.
To convert this recipe to a peach cobbler, cover the pie filling with canned biscuit dough instead of the crumble topping.