Chocolate Chip Pound Cake With Chocolate-Coffee Liqueur Sauce

Ingredients

• 1 pound (3 1/4 cups) all-purpose flour
• 1 tablespoon coarse salt
• 4 sticks softened unsalted butter, plus more for pans
• 2 cups sugar
• 1 teaspoon pure vanilla extract
• 9 large eggs, room-temperature
• 2 cups semisweet or bittersweet chocolate chips
• 6 ounces chopped semisweet chocolate
• 5 tablespoons coffee liqueur, preferably kahlua
• 1 tablespoon pure vanilla extract
• 1 tablespoon light corn syrup
• vanilla ice cream, for serving