To prepare Peaches and Cream Crumble Bars, follow these simple steps:

1. Preheat the Oven: Start by preheating your oven to 350°F (175°C). Grease a 9×13-inch baking dish or line it with parchment paper for easy removal.

2. Prepare the Peach Filling: In a mixing bowl, combine the diced peaches, lemon juice, granulated sugar, and vanilla extract. Stir well and set aside to let the flavors meld.

3. Make the Crumble Base: In another bowl, mix the flour, oats, brown sugar, baking powder, baking soda, and salt. Add the melted butter to the mixture and stir until everything is combined.

4. Assemble the Base: Press about two-thirds of the crumble mixture into the bottom of the prepared baking dish to form the crust. Press firmly to create an even layer.

5. Layer the Cream Cheese Filling: In a separate bowl, beat the softened cream cheese, powdered sugar, and vanilla extract together until smooth. Spread the cream cheese mixture over the crust evenly.

6. Add the Peach Layer: Carefully distribute the prepared peach filling over the cream cheese layer.

7. Top with Remaining Crumble: Sprinkle the remaining crumble mixture over the peaches, ensuring even coverage.

8. Bake: Place the baking dish in the preheated oven and bake for 30-35 minutes, or until the top is golden brown.

9. Cool: Once baked, remove from the oven and let it cool in the pan for at least an hour. This allows the layers to set properly.

10. Cut Into Bars: After cooling, cut into squares and serve!

These straightforward instructions will help you achieve delicious Peaches and Cream Crumble Bars that everyone will adore.