These Chocolate Mousse Protein Bars are the perfect blend of rich chocolate and creamy tahini, creating a satisfying, nutrient-dense snack. Ideal for those following a vegan and keto lifestyle, they’re made with low-carb, nutritious, and accessible ingredients and require just a quick stovetop step—no baking involved.
Packed with protein from plant-based protein powder and healthy fats from tahini and coconut milk, these bars are a great option for supporting a balanced, low-carb eating pattern. Whether you’re prepping for the week or looking for a post-workout bite, they’re simple to make and easy to customize with toppings like cacao nibs or sesame seeds.
As a 40-something gym-goer who’s actively trying to build muscle—not lose it— I need to get enough protein for muscle support and recovery. This can be a challenge on a low-carb, plant-focused diet. These bars tick all my boxes: delicious, convenient, and nourishing. They’re a great way to stay on top of your protein goals without relying on highly processed or store-bought options.
Chocolate Mousse Protein Bars
Description
These Chocolate Mousse Protein Bars are creamy, chocolate-rich, and made with vegan, keto-friendly, and nutrient-dense ingredients like tahini and coconut milk. With a quick stovetop step and no baking required, they’re perfect for a wholesome snack or post-workout bite.
║ Yield — 9 servings of 1 bar each, totaling 9 bars
║ Time — Prep: 25 minutes | Cool: 3-4 hours
║ Equipment required — a 7-inch (18cm) square cake pan or 9x5-inch (23x13cm) loaf pan. I love this one.
║ Storage — Refrigerate for up to 5 days. It can also be frozen.
Ingredients
Instructions
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Put the tahini in a medium-sized mixing bowl.
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Combine the cocoa powder and protein powder in a small bowl.
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In another small heat-safe bowl, put the baking chocolate, allulose, vanilla, and a pinch of salt.
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In a small saucepan, whisk together the coconut milk, agar agar powder, and ⅛ teaspoon salt. Bring to a low boil on medium heat. Reduce heat to low, and simmer for 5 minutes. Whisk occasionally and monitor and adjust heat if necessary to prevent boiling over.
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Meanwhile, line a 7-inch (18cm) square cake pan or 9x5-inch (23x13cm) loaf pan with parchment. Allow the parchment to hang over at least 2 sides of the pan for easy removal of the bars and/or use a loose-bottomed pan.
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Add roughly ½ cup + 2 tablespoons (150ml) of the coconut milk mixture to the chopped chocolate bowl and whisk until all chocolate chunks are melted. Add the remaining coconut milk mixture to the tahini bowl and whisk until fully combined.
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Add the protein powder and cocoa powder to the tahini-coconut milk mixture and combine thoroughly to form a smooth dough without any dry patches. I use a medium-sized silicone spatula for this.
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Transfer the dough to your lined pan and spread/press it into an even layer. I use the spatula and/or my hands for this.
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Cover the top of your bars with the melted chocolate mixture. Optionally, drizzle with a little tahini and sprinkle with cacao nibs and sesame seeds.
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Transfer the bars to the fridge to cool and set for 3 to 4 hours.
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Cut into 9 bars and enjoy chilled or at room temperature.
Used to Make This Recipe
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Nutrition Facts
Servings 9
Serving Size 1 bar
- Amount Per Serving
- Calories 255kcal
- % Daily Value *
- Total Fat 21g33%
- Saturated Fat 11g56%
- Total Carbohydrate 13g5%
- Dietary Fiber 4g16%
- Protein 12g24%
- Allulose 5.5g
- Net Carbs 3.5g
* Total Carbs - (Fiber + Allulose + Sugar Alcohols) = Net Carbs
Notes
- If you don’t have tahini on hand or are allergic to sesame seeds, another nut or seed butter (like almond or sunflower seed butter) should work well.
- These bars are sweetened primarily by the protein powder. If your protein powder isn’t very sweet, you may want to add a bit of additional sweetener. If you're using an unsweetened or plain protein powder, a touch of pure monk fruit or stevia can help balance the flavor. I haven’t tested this with granulated sweeteners in the dough itself, so results may vary.
- With 1 teaspoon of agar agar powder, the bars are quite soft and have a mousse-like texture. They still hold their shape at room temperature and can be eaten by hand. If you prefer a firmer, more durable bar, you can increase the agar agar—I've tested up to 1 tablespoon (3 teaspoons). Just note: the more agar you use, the faster the mixture sets, so you'll need to mix and shape the bars more quickly once the coconut milk mixture is added.
