Holidays Cookies

My 8 yr old is a Cookie Monster. Holidays are tough as we get unbelievable amount of pretty high quality/ high calorie gifts as my husband owns a business. Setting a boundary is not working and at times he is trying to look for them all over the house as I put them away. I don’t want him fall off the stool trying to look for hidden sugar. Please help me to gently coach him at his level. If I tell him ask your self if you really need another cookie… he is really really hungry. My 10 yr old tries to help him being a model but it doesn’t help much. I am bit worried that he is overweight and buffers with sugar. Very well behaved kid otherwise and suppress emotions and well liked by friends.