Preheat the oven to 350°F (175°C). Lightly spray a 9×9-inch square baking pan with nonstick spray. Line with parchment paper, allowing the edges to overhang for easy removal later.
In a large mixing bowl or stand mixer, cream the salted butter and powdered sugar together on medium speed until smooth and fluffy, about 1–2 minutes. Add the vanilla bean paste and salt; mix briefly to combine.
1 cup 2 sticks, 227 g salted butter, at room temperature, 1 cup 120 g powdered sugar, 1 teaspoon salt, 1 tablespoon vanilla bean paste
Add the flour and mix on low speed just until a soft dough forms. Do not overmix, as this can make the crust tough. Press the dough evenly into the bottom of the prepared pan, making sure the surface is level.
2 cups 240 g all-purpose flour
Bake the crust for 20–30 minutes, or until the edges are lightly golden. The center should remain pale. Remove from the oven, but keep the oven on for the custard layer.
In a medium mixing bowl, beat the cream cheese until smooth and creamy. Add the powdered sugar and salt; mix until combined.
1 12 oz package cream cheese, room temperature, 1 cup 120 g powdered sugar, ½ teaspoon salt
Add the eggs one at a time, mixing on low speed just until incorporated after each addition. Stir in the pure maple syrup gently until smooth and fully combined. Avoid overmixing to prevent air bubbles that can cause cracks during baking.
½ cup pure maple syrup, 3 large eggs
Pour the maple custard mixture evenly over the warm shortbread crust. Use a spatula to smooth the top.
Bake for 12–15 minutes, or until the center is just set and still has a slight jiggle when the pan is moved. Do not overbake.
Remove from the oven and place the pan on a cooling rack. Let the bars cool completely at room temperature.
Once cool, cover and refrigerate until firm—at least 2 hours or overnight for best texture.
Lift the chilled bars from the pan using the parchment paper. Slice into 9–12 squares with a sharp knife. Serve chilled or at room temperature.
Store covered in the refrigerator for up to 5 days.