Chocolate Cake with Espresso Glaze

Name: Chocolate Cake with Espresso Glaze
Ingredients: 3 tbsp. unsalted butter or nondairy margarine; 6 oz. bittersweet chocolate; 6 large eggs; 1 c. granulated sugar (for cake); 3 tbsp. instant espresso powder (for cake); 0.25 tsp. coarse salt (for cake); 1 tbsp. vanilla extract (for cake); 3 oz. bittersweet chocolate; 1.5 tbsp. unsalted butter or nondairy margarine (for glaze); 2 tsp. vanilla extract (for glaze); 1 tbsp. instant espresso powder (for glaze); 0.25 tsp. coarse salt (for glaze)