Raspberry Brownies

Ingredients

• 1 cup (2 sticks) unsalted butter
• 4 ounces unsweetened chocolate, chopped
• 4 large eggs
• 1 1/2 cups sugar
• 1 teaspoon pure vanilla extract
• 2 Tablespoons raspberry liqueur
• 1/2 teaspoon salt
• 1 cup all-purpose flour
• 1 1/2 cups shelled walnuts, coarsely chopped
• 1/2 cup mini semisweet chocolate chips
• 1 cup raspberry preserves