Your body isn't storing more fat at a calorie deficit. Sure, if you eat all your calories at once, a lot of that will be converted to fat if your body doesn't have an immediate use for it, but you're going to burn more fat than you gained overall as long as you are consuming less energy than your body needs on a daily basis.
Losing weight is literally a physics problem. You need to just eat less than your body needs and the fat will come off. You just need to make sure you're having a reasonable amount of protein so your body isn't cannibalizing your muscles