Land O' Lakes Inc in Volga, SD, US (United States)

Heat oven to 350°F. Spray 13x9-inch baking pan with no-stick cooking spray. Set aside. Combine all crust ingredients in large bowl. Beat at low speed, scraping bowl often, until mixture resembles coarse crumbs. Press crumb mixture into prepared pan. Bake for 10 minutes. 

Microwave 1/2 cup butter and marshmallow crème in large microwave-safe bowl on HIGH, stirring once, until melted (1 1/2 to 2 1/2 minutes). Stir until well mixed. Stir in 4 1/2 cups powdered sugar; mix well. 

Heat oven to 375°F. Spray 13x9-inch baking pan with no-stick cooking spray. Combine cereals, pretzels and nuts in prepared pan. Set aside. Combine brown sugar, butter and corn syrup in 2-quart heavy saucepan. 

Heat oven to 350°F. Combine flour, sugar and 2/3 cup butter in large bowl. Beat at low speed, scraping bowl often, until mixture resembles coarse crumbs. Stir in 1/3 cup pecans by hand. Press onto bottom of ungreased 13x9-inch baking pan. 

Melt butter in 10-inch skillet; stir in nuts and 1/2 cup sugar. Cook over medium heat, stirring occasionally, until sugar is melted and nuts are browned and caramelized (8 to 12 minutes). Meanwhile, combine 3 tablespoons sugar and cardamom in large bowl. Stir in hot caramelized nuts; toss to coat.