A single serving size of traditional pesto with oil is 2 tablespoons and contains about 120 calories with 18 grams of fat. Since this version is oil-free it contains half the calories and fat! Feel free to indulge in larger servings. You'll notice that the recipe card calculates the calories and nutrition for a 1/4-cup serving. This recipe makes 2 cups, which is enough to dress 16 ounces of pasta with plenty leftover to refrigerate or freeze (see tips below). If you want to reduce or increase this recipe, simply move the slider bar on the recipe card and the ingredient amounts will automatically adjust.