Eat more caloric dense foods, lol.
The consensus from very knowledgeable people like Alan Aragon is that the distinction between "clean" and "dirty" foods is arbitrary. Whole foods are generally called "clean" whilst processed foods are considered "dirty", yet whey protein is a highly processed food and many people on so-called "clean diets" consume a lot of it.
It's more correct to look at the nutrient density and avoid trans fats or large quantities of saturated fat. Once you know your calorie and macro targets you can eat whatever you like as long as it helps you meet those targets. This is called "if it fits your macros" (IIFYM) and works fine.
The consensus from very knowledgeable people like Alan Aragon is that the distinction between "clean" and "dirty" foods is arbitrary. Whole foods are generally called "clean" whilst processed foods are considered "dirty", yet whey protein is a highly processed food and many people on so-called "clean diets" consume a lot of it.
It's more correct to look at the nutrient density and avoid trans fats or large quantities of saturated fat. Once you know your calorie and macro targets you can eat whatever you like as long as it helps you meet those targets. This is called "if it fits your macros" (IIFYM) and works fine.