orange chocolate chunk cake

INGREDIENTS

• 1/2 pound unsalted butter at room temperature
• 2 cups sugar
• 4 extra-large eggs at room temperature
• 1/4 cup grated orange zest (from 4 large oranges)
• 3 cups all-purpose flour plus 2 tablespoons
• 1/2 teaspoon baking powder
• 1/2 teaspoon baking soda
• 1 teaspoon kosher salt
• 1/4 cup freshly squeezed orange juice
• 3/4 cup buttermilk at room temperature
• 1 teaspoon pure vanilla extract
• 2 cups good semisweet chocolate chunks
• 1/4 cup sugar
• 8 ounces semisweet chocolate chips
• 1/2 cup heavy cream
• 1 teaspoon instant coffee granules