Melt the caramels with the heavy cream (or evaporated milk) in the microwave, stirring until smooth. Set aside.
11 ounces unwrapped caramels, 3 Tablespoons heavy cream
In a large bowl, beat the softened butter with the granulated sugar and brown sugar until creamy. Mix in the eggs and vanilla.
1 cup salted butter, 1 cup (200g) granulated sugar, 1 cup (200g) brown sugar, 2 large eggs, 2 teaspoons pure vanilla extract
Add the flour, baking soda, and salt, stirring just until the dough comes together. Fold in the chocolate chips.
2½ cups (353g) all-purpose flour, 1 teaspoon baking soda, 1 teaspoon salt, 2 cups semisweet chocolate chips
Heat the oven to 350°F and line a 9×13-inch pan with parchment. Press half of the dough evenly into the bottom of the pan.
Pour the warm caramel over the dough, leaving a small border around the edges. Chill the pan for about 15 minutes to help the caramel set slightly.
Crumble or press the remaining dough over the caramel layer.
Bake for 25–35 minutes, or until the edges are golden brown.
Cool completely before slicing. Chilling the bars first makes for the cleanest cuts.