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Cream butter, brown sugar, and sugar until creamy.
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Add egg, yolks, and vanilla and mix until smooth.
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Add malt powder, baking soda, salt, and flour. Stir until combined.
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Mix in chocolate chips and whoppers.
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Scoop into 3 tablespoon balls.
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Chill in the fridge for 10 minutes.
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Bake for 8-11 minutes at 350 F or store in bag in the fridge or freezer until cook time.