Mississippi Mud S'Mores-Fudge Pie

INGREDIENTS

• 2 cups graham cracker crumbs
• 1/2 cup butter, melted
• 2 1/4 cups sugar, divided
• 1 1/2 cups coarsely chopped pecans, toasted and divided
• 1 (4-oz.) semisweet chocolate baking bar, chopped
• 1 cup butter
• 1 1/2 cups all-purpose flour
• 1/2 cup unsweetened cocoa
• 4 large eggs
• 1 teaspoon vanilla extract
• 3/4 teaspoon salt
• 3 cups regular marshmallows, cut in half horizontally
• 2 cups miniature marshmallows
• Chocolate Frosting