Desserts · Cookies

Peanut butter protein cookies

Name: Peanut butter protein cookies
Prep time: 10 min
Cook time: 10 min
Total time: 20 min
Yield: 12 servings
Ingredients: 1 cup peanut butter, smooth, unsweetened; 2/3 cup erythritol, brown-style monk fruit blend; 1 egg egg; 2 scoops whey protein, vanilla — a whey-casein blend is best; 1/4 cup sugar-free chocolate chips; 1 tsp vanilla extract; 1/4 tsp salt

A flourless peanut butter cookie with protein powder and no added sugar — the one protein cookie formulation the internet actually makes on repeat. Same calories per cookie as the classic, four times the protein, and honest about what it is: a soft peanut butter cookie, not a crisp-edged Toll House.

Time: 20 min (10 prep + 10 cook)
Servings: 12
Per serving: 179 kcal
Protein: 8 g

Ingredients

1 cup peanut butter, smooth, unsweetened258 g
2/3 cup erythritol, brown-style monk fruit blend130 g
1 egg egg50 g
2 scoops whey protein, vanilla — a whey-casein blend is best50 g
1/4 cup sugar-free chocolate chips45 g
1 tsp vanilla extract4 g
1/4 tsp salt2 g

Every ingredient links to its food page — same data, same score, same formula.

Steps

Heat the oven to 175°C (350°F). Beat the peanut butter, sweetener, egg and vanilla together until glossy.
Work in the protein powder and salt — the dough turns thick and a little stiff; if it crumbles rather than holds, add milk a teaspoon at a time. Fold in the chips.
Roll into 12 balls and press each properly flat with a fork. Nothing spreads without real sugar, so the shape you press is the shape you get.
Bake 9–10 minutes, until the edges are set and the middles still look underdone. Cool completely on the tray — they firm as they cool and crumble if you rush them.

How close is it to a real cookie?

Honestly: a soft, dense peanut butter cookie without the crisp edge — reviewers in this niche calibrate it around a decent store-bought soft cookie. Judged against other protein snacks rather than against Toll House, it's near the top of the category.

Which protein powder?

A whey-casein blend, if you have it. Pure whey sets hard and dries the cookie out; casein stays soft but drinks more liquid, so add a splash of milk if the dough stiffens. Plant protein makes them rubbery — this is the recipe's one hard requirement.

Which sweetener?

A brown-style erythritol or monk fruit blend is standard. Erythritol can leave a faint cooling note and re-crystallise; swapping to allulose makes them softer and browner (watch the bake — it colours fast). Same score either way, which the swap shows.

Why no More filling chip?

Because we tested and it barely moves. A cookie built on nut butter is close to its floor no matter what you do to the amounts — the honest gains here are the protein and the missing sugar, and those are already in the recipe.

Alternatives

Why this score

easy to overeat

Dense calories with little protein, volume or fiber to fill you up.

Three routes to fullness — one is enough

15% of kcal

3% water

12 g/Mcal

What pulls it down

How scores work

Computed on the finished dish, not an average of the parts: 2147 kcal goes into the pot, 539 g of ingredients comes out as ~500 g of food → 429 kcal per 100 g. Cooking moves water, and energy density is the score's biggest lever — so we show the math. Full formula here.

Per

Calories: 429
Protein: (15%); 20 g
Fat: (52%); 31 g
Carbohydrates: (33%); 45 g
of which sugar: 5 g
Fiber: 5 g
Sodium: 319 mg

Percentages are the share of calories from each macronutrient.

Computed from the ingredients' USDA data — nothing typed by hand. Every number is traceable, every score recomputable.

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Photo: AI-generated. Nutrition and score are computed from the ingredients with the published formula — this recipe hasn't been kitchen-tested by us yet.