Flavour
Rich roasted peanut butter, Canadian honey and Belgian dark chocolate, with rolled oats rounding out the bite.
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The bar that started Zentein · Since 2020
25 g protein · Five core ingredients · Made weekly
Rich roasted peanut butter, Canadian honey, Belgian dark chocolate and rolled oats in a soft, chewy protein bar.
Peanut Butter Cup, tasted and reviewed.
Not sure which bar is right for you? Find Your Zen →
Taste & texture
Rich roasted peanut butter, Canadian honey and Belgian dark chocolate, with rolled oats rounding out the bite.
Soft, chewy and a little fudge-like, with a dense, satisfying bite.
Why freshness matters
We make our bars every week for the quality and texture we want them to have.
Enjoy your bars as fresh as possible. Their texture behaves like real food because they are made with simple ingredients and no artificial preservatives.
A weekly production rhythm keeps quality and texture at the centre.
The bars can become firmer with time. That is a natural part of working with real ingredients.
Remove the wrapper, place the bar on a microwave-safe plate and warm for 10–20 seconds for a softer, gooier bite.
The original
Peanut Butter Cup was our first product in 2020. Bovine collagen was part of the original recipe, and it remains one of the bar's protein sources today.
Peanut Butter Cup was the starting point for Zentein.
Collagen was not added later to follow a trend. It was part of the original formulation.
Before Zentein began, Army training and dealing with injuries had already put collagen on our founder's radar. That familiarity helped shape the original bar.
We make Peanut Butter Cup weekly in Ontario for the quality and texture we want.
Ways to enjoy it
Keep it simple, warm it up, share the two pieces or turn it into dessert.
The easy option when you want a quick, satisfying protein snack.
Remove the wrapper before microwaving. Warm for 10–20 seconds. If it gets especially soft, put it on a plate and enjoy it with a fork or spoon.
Share one piece with a friend, split the bar with someone you love or save the second piece for later.
Chop or crumble pieces over ice cream, oatmeal or yogurt for extra peanut-butter-cup flavour.
Warm it using the directions above, then add your favourite topping for a richer dessert-style bite.
Five core ingredients
Shown in the same order as on the current package. Each ingredient contributes protein, flavour, sweetness or texture.
Protein and a satisfying bite
Why it is hereBovine gelatin is one of the ingredients that contributes protein and helps create the bar's dense, satisfying bite.
Real-food sweetness and binding
Why it is hereHoney sweetens the bar and helps hold the five-ingredient recipe together.
Flavour, texture and protein
Why it is hereNatural peanut butter brings rich roasted flavour, creamy texture and some of the protein in each bar.
The chocolate layer and finish
Why it is hereBelgian dark chocolate adds cocoa flavour and the chocolate finish that completes the peanut-butter-cup profile.
Chewy texture and some protein
Why it is hereRolled oats help create the soft, chewy structure and contribute a smaller amount of protein to the recipe.
Nutrition & ingredients
Collagen (bovine), sugars (honey), natural peanut butter, Belgian dark chocolate [cocoa mass, sugar, cocoa butter, soy lecithin (as emulsifier), natural vanilla], oats.
Contains: Peanuts, soy.
Produced in a facility that also processes tree nuts, milk, soy and gluten.
Customer reviews
4.9 out of 5 from 196 current reviews. Customers often mention the taste, satisfying texture and convenience.
“They're so good, it has become a treat for working out! I love that they're whole foods and clean, and they taste great.”
“They're filling, satisfying, and perfect as a snack or post-workout option. My only minor criticism is the price, but the buy-5-and-save discount makes them much more affordable.”
“I’m finding the protein bars very tasty and easy to throw into my bag when I’m on the run.”
Choose your flavour
Same 25g protein. Two very different cravings.
Roasted peanut butter, honey + Belgian dark chocolate.
Real freeze-dried strawberry, peanut butter, honey + Belgian white chocolate.
Rich, nutty + chocolatey
Bright, creamy + berry-forward
Belgian dark chocolate
Belgian white chocolate
No fruit
Real freeze-dried strawberries
Build your routine
Choose hydration, unflavoured collagen or a crisp snack for more variety.
Add a convenient hydration option to training and busy days.
Add a simple, unflavoured collagen option to your daily routine.
Add a crisp texture and more flavour variety to your snack rotation.
Product details
No. The bars are shelf stable and do not require refrigeration. Enjoy them at room temperature, chilled or warmed, depending on the texture you prefer.
Remove the wrapper before microwaving. Place the bar on a microwave-safe plate and warm for about 10–20 seconds. It can become very soft and gooey, so a fork or spoon may be helpful.
Its protein comes from a combination of bovine gelatin, peanut butter and rolled oats. The current package lists 25 g of protein per 65 g package.
Contains peanuts and soy. Produced in a facility that also processes tree nuts, milk, soy and gluten.
Most orders are prepared for shipment within 1–3 business days. Delivery estimates begin once your order has shipped. See the current shipping policy for details.
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