Preheat the oven to 350°F. Line an 8 x 8-inch pan with a parchment paper sling.
Combine graham crackers, butter, and sugar until moistened. Press into the pan.
1 1/3 cups crushed graham cracker crumbs, 6 Tablespoons salted butter, 2 Tablespoons granulated sugar
Bake the crust for 10 minutes. Remove from the oven and reduce the oven temp to 325°F.
In a large bowl, beat cream cheese, sugar, and sour cream until smooth.
2 (8-ounce) packages full-fat cream cheese, 3/4 cup granulated sugar, 1/2 cup sour cream
Add eggs, vanilla, and salt. Mix on low speed just until combined.
2 large eggs, 2 teaspoons pure vanilla extract, 1/4 teaspoon salt
Pour into crust and bake 40-45 minutes until set around edges and only slightly jiggly in center. Turn off heat and crack the oven door. Leave the bars in the oven for 30 minutes, then remove and cool completely.
Warm caramel sauce until pourable. Drizzle bars with caramel sauce. Chill for 4 hours.
1/2 cup salted caramel sauce
Cut into bars and sprinkle with flaky salt just before serving.
Flaky sea salt