Sticky Toffee Pudding

Name: Sticky Toffee Pudding
Ingredients: 6 tablespoons unsalted butter, plus more for the pan; 2 large eggs; 8 ounces dried pitted dates (about 1 1/2 cups); 1 teaspoon baking soda; 1 cup boiling water; 1 1/2 cups all-purpose flour; 1 1/2 teaspoons baking powder; 1/2 teaspoon kosher salt; 1/2 teaspoon ground cinnamon; 1/4 teaspoon ground cloves; 1/8 teaspoon ground nutmeg; 3/4 cup packed dark brown sugar; 1 1/2 teaspoons vanilla extract; 8 tablespoons (1 stick) unsalted butter; 1 1/4 cups packed dark brown sugar; 1 cup heavy cream; 2 teaspoons vanilla extract; Flaky salt, for sprinkling (optional); Vanilla ice cream, for serving