Preheat your oven to 325°F (160°C). Line a 9×9-inch pan with parchment for easy removal. Don’t skip this or you’ll cry later when you try to peel bars apart.
Make the crust: mix graham cracker crumbs, melted butter, and sugar until moistened. Press firmly into the bottom of the pan. A flat-bottomed glass helps; yes, this is a legit kitchen hack.
Bake crust 10 minutes, then let cool while you prep the filling. This keeps the crust from sogging out like a wet sponge.
Beat cream cheese with sugar until smooth and fluffy. Add eggs one at a time, then mix in sour cream, vanilla, and salt. You want a silky batter, not a chalky lump.
Stir in mango puree until fully incorporated. The mixture should be vibrant and glossy—picture sunshine in a bowl.
Pour filling over cooled crust. Gently tap the pan to release air bubbles. A quick swirl with a spatula looks pretty, too, but don’t overdo it.
Bake for 35–40 minutes until the edges look set but the center wiggles slightly. The center will firm up as it cools. Don’t bake until it’s a dry brick—no one wants that.
Cool at room temp for an hour, then refrigerate at least 4 hours (ideally overnight). Patience, friend—the flavors need to mingle like a good duo at a party.
Slice with a warm knife for clean edges. Garnish with mango cubes, lime zest, or mint if you’re feeling fancy.