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Pre-heat oven to 350°F
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Line a 9*13 baking pan with foil, allowing to overlap the sides. Spray with cooking spray. Set aside.
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In a mixing bowl, whisk together butter and sugars.
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Slowly whisk in eggs and vanilla.
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In a small bowl combine flour, 2 tablespoons malted powder and 1 tablespoon peanut butter powder.
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Whisk to combine with butter/sugar mix.
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Fold in 1 1/2 cups dark chocolate chips and 1/2 cup chopped whoppers.
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Spread batter into prepared baking dish.
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Bake cookie bar for 25-30 minutes until a tooth pick inserted comes out clean and golden brown.
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Immediately spread marshmallows evenly over hot cookie.
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Cook under broiler for 2-3 minutes.
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Use a spatula evenly spread melted marshmallows.
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While the bars are baking, heat sweetened condensed milk, in large sauce pan, over low heat.
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Stir in dark and milk chocolate chips. Heat until smooth, whisking constantly.
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Remove from heat and whisk in remaining malted and peanut butter powder.
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Spread evenly over marshmallow layer.
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Press remaining whoppers into fudge layer.
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Refrigerate malted wonder bars for 4 hours or overnight.
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Lift bars out of pan and then carefully remove foil.
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Cut into squares.