Baking question. (Smart For Life Cookies).?

I made a version of those diet cookies "Smart For Life" today, they turned out EXCELLENT. I calculated nutrition info as I went along so I would accurately know how much of this & that such as calories, fat, fiber and such. Upon completion, I compared my calculations to "Smart For Life" cookies, I am close but would like to reduce the fat and sodium content. All the ingredients are mostly healthy and the only place I see eliminating fat & calories is in the butter/margarine and or peanut better. What can I use in place to still have a nice texture that does not result in a cake like cookie? I want the cookies somewhat dense.

Here are the comparisons-

Smart For Life Cookies---- My Version

Fat 2.5 grams---- 5 grams

Calories 105---- 23

Saturated Fat 1.5 grams---- Less than 1 gram

Polyunsaturated Fat 0---- 1.5 grams

Monounsaturated Fat 0---- 2 grams

Sodium 120 mg---- 179 mg

Potassium 0---- 81 mg

Fiber 1.5 grams---- 2 grams

Sugars 5 grams---- 5 grams

Protein 5 grams---- 3 grams

Carbs 15 grams---- 13 grams

*THIS IS PER COOKIE