Creamy, tangy, and irresistibly simple, these Lazy Day Lemon Cream Pie Bars are the kind of dessert that looks like you fussed over it all afternoon but actually comes together in a snap.
Preheat your oven to 350°F (175°C). Grease a 9×9 inch baking dish. Make sure the dish is well-coated so the bars release easily.
In a mixing bowl, combine the flour and powdered sugar. Cut in the cold butter using a pastry cutter, two knives, or your fingertips until the mixture resembles coarse crumbs. Work quickly so the butter stays cold.
Press the mixture evenly into the prepared baking dish to form the crust. Use the bottom of a measuring cup to pack it down evenly. Bake for 15-18 minutes, or until lightly golden around the edges.
In another bowl, whisk together the sweetened condensed milk, lemon juice, and lemon zest until well combined. Taste and adjust zest or juice if you want it tarter.
Pour this lemon mixture over the baked crust and return to the oven. Bake for an additional 15-20 minutes, until the filling is set but still slightly jiggly in the center — it will firm as it cools.
Let the pan cool completely on a wire rack. Meanwhile, in a separate bowl, whip the heavy cream, sugar, and vanilla extract until stiff peaks form. Be careful not to overwhip; stop when the cream is glossy and holds its shape.
Spread the whipped cream over the cooled lemon filling in an even layer. Refrigerate for at least 2 hours before cutting into bars and serving. Chilling helps the filling set and makes neat slices easier.
Notes
These bars are best served chilled. Cover tightly with plastic wrap or store in an airtight container. They stay fresh in the fridge for up to 4 days.