Protein Jam: Sugar Free Strawberry Jam Recipe (No Sugar!)

Name: Protein Jam (Sugar Free Strawberry Jam)
Prep time: 2 min
Cook time: 10 min
Total time: 12 min
Ingredients: 1 cup Strawberries (Fresh or Frozen, Chopped (144g)); 3 Tbsp Water; 1 Tbsp Vanilla Protein Powder (5g); 1 scoop Unflavored Collagen (10g); 1½ Tbsp Flaxseed Meal (10g); 1 tsp Lemon Juice

This protein jam is a sugar free strawberry jam sweetened with protein powder, boosted with collagen, and thickened with flaxseed - low carb, keto friendly, and better than anything at the store.

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An unbelievable Strawberry Protein Jam sweetened with protein powder, boosted with collagen, and thickened with flaxseeds. This healthy high protein strawberry jam is sugar free, low carb, keto friendly, and much better than all the store stuff!

I didn't grow up on PB&J. I'm not going to get into the whole immigrant-kid-discovers-American-lunch-staples thing right now, but the short version is I missed out on peanut butter and jelly sandwiches for most of my childhood, and by the time I tried one as an adult I was annoyed at myself for waiting so long. Sweet and salty just works. It's not a revelation, everyone else already knew this, I was just late.

The problem was every jar of jam at the store was basically so much sugar with a strawberry personality. So I started making my own!

Ingredients for this High Protein Jam

Nothing fancy here - this jam recipe leans on a handful of ingredients that do double duty as both flavor and protein.

Fresh or Frozen Strawberries the base of the jam. Frozen works exactly as well as fresh since everything gets cooked down anyway, so don't stress about buying in season. Just make sure it is real fruit!
Vanilla or strawberry protein whey powder - this is what makes it a protein jam. It also acts as your sweetener, so you don't need added sugar.
I recommend the Isopure Whey Vanilla, Dymatize Vanilla, or Legion Vanilla Whey - all three are clean, mix smooth, and don't leave a chalky aftertaste.
- TIP: If you're plant-based, KOS, or Truvani all work fine here, they just thicken slightly differently, so give it an extra minute off heat.
Unflavored collagen peptides - adds protein without changing the flavor at all, and helps the jam set up with a better texture than protein powder alone. I use Vital Proteins Unflavored Collagen Peptides.
Flaxseed meal -this is your thickener. It does the job pectin usually does, minus the sugar pectin recipes typically need to set properly.
- Sub: swap for chia seeds 1:1 if that's what's in your pantry - same thickening effect, slightly different texture.
Lemon juice - cuts the sweetness and helps the jam keep a little longer in the fridge.
Water - just to get the strawberries cooking before they break down on their own.

TIP: If you want it sweeter, a few drops of liquid stevia or a spoonful of Lakanto Maple Flavored Syrup does the trick without adding sugar.

Choosing Your Protein Source

Whey isolate is what I use because it dissolves clean and doesn't fight the fruit flavor. But it's not the only option, and which one you grab actually changes the texture:

Unflavored collagen peptides - not a full protein swap, but the reason this jam has the boost it does. Flavorless, dissolves completely, no gritty aftertaste.
Whey protein isolate/concentrate - fastest to dissolve, closest to the texture in this recipe. What I use.
Casein protein - digests slower, and it'll set your jam up noticeably thicker. Good if you want a spreadable-not-runny consistency.
Vegan/plant protein (pea, brown rice, or a blend) - works, but can read slightly grittier than whey. Give it the full 10 minutes to thicken before judging the texture.

How to Make Protein Jam

Cook Down the Strawberries: Add your chopped strawberries and water to a small saucepan over medium heat. Let them bubble and break down for 7-10 minutes, stirring occasionally so nothing catches on the bottom.

Mash It Out: Once the fruit's soft and jammy-looking, mash with a potato masher or the back of a spoon. Leave it chunky or smooth, whatever you're into - I don't mind a few small strawberry pieces still intact.

Stir in the Protein: Take the pot off the heat completely before adding the protein powder - this matters, because dumping protein powder into something still boiling is how you end up with clumps instead of jam. Stir in the collagen, protein powder, flaxseed meal, and lemon juice until fully combined.

Let It Thicken: Give it 5 minutes off heat to set up. It'll look loose at first - that's normal, the flaxseed needs a few minutes to do its thing. If it's still thinner than you want after 5 minutes, give it another 5.

Taste Test: Taste it before you jar it up. If it needs more sweetness, add stevia or your sugar-free syrup of choice a little at a time - you can always add more, you can't take it out.

Tips for the Best Protein Jam

Don't overdo the protein powder. One scoop is the number, not three. Learned that one the hard way.
Take it off heat before mixing in protein powder. Adding it while the jam's still boiling scrambles the texture into clumps.
Let it cool before jarring. Protein jam thickens more as it cools, so don't panic if it looks a little loose right off the stove.
Use a protein powder you actually like the taste of. You're tasting it directly here, unlike in a baked good where other flavors cover it up.
Jam turned out gritty? That's usually a lower-quality protein powder or a plant-based blend that didn't get enough time off heat to fully hydrate. Give it another 5 minutes, or switch to a whey isolate next round.
Not sweet enough? Add sweetener in small amounts after tasting - stevia, monk fruit, or a sugar-free syrup - rather than guessing upfront. Fruit ripeness changes this every time.

How to Store Protein Jam

Fridge: Store in an airtight container for up to 7 days. Since there's no added sugar acting as a preservative, don't push past a week.

Freezer: Freezes well in an airtight, freezer-safe container for up to 3 months. Thaw in the fridge overnight before using.

FAQs: Your Questions on Speculoos Cookie Butter Cheesecake Answered

Can I use regular cookie butter instead of almond butter for the drizzle?

Yes, you can use melted Biscoff cookie butter for the drizzle!

What is the difference between Biscoff and Speculoos?

Speculoos is essentially the same as Biscoff! Biscoff is the brand name of the famous Belgian speculoos biscuit, which is a spiced shortcrust cookie. They have the same delicious spice blend of cinnamon, nutmeg, and cloves.

Variations on This Sugar Free Strawberry Jam

Swap the fruit: Turn it unto a Raspberry, blackberry, or blueberry jam!
Go tropical: Pineapple, kiwi, or peaches make a good swap if you want something outside the berry family.
Try stone fruit: Peaches, plums, or apricots bring a different sweetness and a nice color shift.
Add spice: A pinch of cinnamon works well with apple or peach versions if you want something more fall-leaning.
Chia seed version: Replace the flaxseed meal with chia seeds 1:1 for a slightly different, more gel-like texture.
Flavor swap: Use strawberry protein powder instead of vanilla for a more concentrated strawberry flavor.

Plant-Based / Vegan Protein Jam

To make this dairy-free, swap the whey protein powder for a plant-based option like KOS Plant Vanilla or Truvani Plant-Based Vanilla, and double check your collagen - collagen is an animal product, so leave it out or replace it with an extra ½ tablespoon of flaxseed meal for thickening if you want this fully vegan.

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