Creating these delicious Raspberry Squares is a fun and rewarding process. Follow these easy steps for success:

1. Preheat Oven: Preheat your oven to 350°F (175°C). Prepare an 8-inch square baking dish by greasing it lightly.
2. Mix Crust Ingredients: In a mixing bowl, combine the flour, granulated sugar, softened butter, and salt. Mix until crumbly.
3. Form the Crust: Press the mixture evenly into the bottom of the greased baking dish. This will form the crust for your squares.
4. Bake the Crust: Place the crust in the oven and bake for 15 minutes, or until lightly golden.
5. Prepare Filling: While the crust is baking, in a separate bowl, whisk together the egg, sugar, vanilla extract, lemon juice, and additional flour (2 tablespoons).
6. Add Raspberries: Gently fold in the fresh raspberries, being careful not to crush them.
7. Pour Filling Over Crust: Remove the crust from the oven and evenly spread the raspberry filling over the warm crust.
8. Bake Again: Return the baking dish to the oven and bake for an additional 15-20 minutes, or until the filling is set.
9. Cool: Allow the squares to cool in the pan for at least 15-20 minutes before cutting them into squares.
10. Dust with Powdered Sugar: For an elegant touch, dust the tops lightly with powdered sugar before serving.

These simple steps will help you create Raspberry Squares that are not only delicious but also show-stopping treats that your friends and family will adore.