Creating Raspberry Lemonade Bars is simple if you follow these easy steps:

1. Preheat Oven: Preheat 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 Crust: In a medium bowl, cream together the softened butter and granulated sugar until light and fluffy.
3. Add Dry Ingredients: Gradually mix in the flour and salt until crumbly. Press this mixture into the bottom of the prepared baking dish evenly, creating a crust layer.
4. Bake the Crust: Place the baking dish in the preheated oven and bake for 15-20 minutes, or until lightly golden.
5. Prepare the Filling: While the crust is baking, whisk together the sugar, lemon zest, lemon juice, and eggs in a bowl until well combined. Add the cornstarch and whisk until smooth.
6. Add Raspberries: Gently fold in the fresh raspberries, being careful not to break them apart too much.
7. Combine and Bake: Pour the filling over the pre-baked crust and return to the oven. Bake for an additional 25-30 minutes, or until the filling is set.
8. Cool: Allow the bars to cool in the pan for about 15–20 minutes at room temperature. Then, transfer to the refrigerator to chill completely.
9. Serve: Once cooled, cut into squares or rectangles as desired. Dust with powdered sugar and garnish with fresh raspberries and lemon slices if desired.

These straightforward instructions will guide you in creating these incredible Raspberry Lemonade Bars with ease.