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Preheat your oven to 375 degrees.
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Lightly spray 8x8 baking dish with cooking spray and set aside.
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Mix together flour, baking soda,and baking powder. Set aside.
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Using a stand or hand mixer, beat softened butter for several minutes until light and fluffy.
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Gradually combine sugar with butter and cream together until smooth.
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Add egg and vanilla to wet mix.
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One half cup at a time, add the dry mix to the wet mix until all ingredients are combined.
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Pour mix into prepared baking dish.
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Bake for 10 minutes in preheated oven, then remove from heat and press M&M's® Red Velvet into the top of the bars.
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Return dish to the oven and continue cooking for another 20-30 minutes or until sugar cookie bars have turned a golden brown.