Creating these delightful Peaches and Cream Crumble Bars is straightforward. Follow these steps for success:

1. Preheat Oven: Preheat your oven to 350°F (175°C).

2. Prepare Peach Filling: In a medium bowl, combine diced peaches, 1/2 cup of granulated sugar, lemon juice, cornstarch, and vanilla extract. Stir gently and set aside to marinate.

3. Make the Crust: In another bowl, mix melted butter, flour, rolled oats, baking powder, 1/2 teaspoon salt, and the remaining 1/2 cup of sugar. Mix until combined, forming a crumbly mixture.

4. Prepare the Cream Cheese Layer: In a separate bowl, beat softened cream cheese, powdered sugar, egg, and almond extract until smooth.

5. Assemble: Grease an 8×8-inch baking dish. Press half of the oat mixture into the bottom of the dish to form a base.

6. Add Cream Layer: Spread the cream cheese mixture evenly over the oat base.

7. Layer with Peaches: Spoon the peach mixture on top of the cream cheese layer, spreading it evenly.

8. Top with Crumble: Sprinkle the remaining oat mixture over the peaches, ensuring even coverage.

9. Bake: Place in the preheated oven and bake for 25-30 minutes or until the crumble is golden brown and the filling is bubbly.

10. Cool: Remove from the oven and allow the bars to cool in the baking dish for at least 20 minutes before slicing.

11. Chill (Optional): For a firmer texture, refrigerate for an additional 30 minutes before serving.