Soft strawberry swirl crumble bars stacked with a golden brown crumble and visible jammy strawberry layer. — These collagen‑infused Strawberry Swirl Crumble Bars bake up buttery, jammy, and picture‑perfect.

These Strawberry Swirl Crumble Bars are buttery, jammy, and secretly collagen‑infused — the kind of dessert that feels indulgent but sneaks in a glow‑boosting twist. The base is soft and creamy thanks to Greek yogurt and collagen peptides, the swirl bursts with fresh strawberries, and the crumble bakes into a golden, bakery‑style top that photographs beautifully.

Whether you’re baking for brunch, meal prep, or your next content shoot, these bars slice clean, hold their shape, and deliver that “wow” moment in every bite.

why you’ll Love Them

Most crumble bar recipes online are simple fruit bars. This one stands out because it’s:

Collagen‑infused for added protein and skin‑supporting benefits
Made with fresh strawberries for a natural, vibrant swirl
Moist and tender thanks to Greek yogurt
Golden and crisp on top with a brown‑sugar crumble
Beginner‑friendly with only 15 minutes of prep

Ingredients

Base Layer

1 egg
½ cup Greek yogurt
⅓ cup melted butter or oil
½ cup sugar or maple syrup
1 tsp vanilla extract
1 ½ cups all‑purpose flour
1 tsp baking powder
Pinch of salt
1 scoop collagen powder

Strawberry Swirl

1 cup chopped strawberries
1 tbsp sugar or honey
1 tsp lemon juice
1 tsp cornstarch
Optional: ½ scoop collagen

Crumble Topping

4 tbsp butter
5 tbsp brown sugar
1 cup flour

The collagen blends seamlessly into the creamy base batter.

Step‑by‑Step Instructions

1. Make the Strawberry Swirl

Simmer strawberries, sugar, lemon juice, and cornstarch until glossy and thick. Cool slightly.

2. Mix the Base

Whisk egg, yogurt, butter, sugar, and vanilla. Add flour, baking powder, salt, and collagen. Spread evenly into a parchment‑lined 8×8 pan.

3. Add the Swirl

Spoon strawberry mixture over the base. Drag a knife through to create a marbled effect.

4. Add the Crumble

Mix butter, brown sugar, and flour until sandy. Sprinkle generously over the top.

5. Bake

Bake at 350°F for 25–30 minutes until golden and set.

6. Cool Completely

Let cool 45–60 minutes before slicing for clean edges.

Spread the base evenly — it should be thick, soft, and easy to smooth out.

FAQs

Can I use frozen strawberries?

Yes — thaw and drain first to avoid excess moisture.

Does collagen change the flavor?

No, collagen peptides are neutral and dissolve completely.

Can I make these gluten‑free?

Yes — use a 1:1 gluten‑free baking flour.

How do I store them?

Refrigerate up to 5 days or freeze up to 2 months.

Can I double the recipe?

Yes — bake in a 9×13 pan for 30–35 minutes.

Bake until the crumble is golden and the strawberry layer is bubbling at the edges.

Collagen in Baking

Collagen peptides dissolve seamlessly into batters and fillings, adding protein and moisture without changing flavor. They help keep baked goods tender and give a subtle “lift” to texture — ideal for soft bars like these.

If you use Vitauthority Vanilla Collagen, you’ll get a hint of vanilla warmth that complements the strawberries perfectly.

Sliced strawberry collagen crumble bars showing jammy layers and crisp crumble. — Once cooled, the bars slice cleanly into soft, jammy squares with the perfect crumble.

Final Thoughts

These Strawberry Swirl Crumble Bars (Collagen‑Infused) are the perfect blend of comfort baking and functional nutrition. They deliver everything you want in a dessert — a buttery base, a jammy strawberry swirl, and a golden crumble — while sneaking in a little extra protein and glow‑boosting benefits from collagen peptides.

Whether you enjoy them as a mid‑day treat, a brunch addition, or a wholesome dessert, these bars prove that better‑for‑you baking can still taste indulgent. They store beautifully, slice cleanly, and photograph like a dream, making them a go‑to recipe for creators, busy parents, and anyone who loves a dessert that feels special without being complicated.

If you make these bars, tag me — I love seeing your creations. And if you’re looking for more collagen‑infused or protein‑forward treats, check out my other recipes like protein banana bread or collagen coffee creamer.

Happy baking, and enjoy every jammy, golden, glow‑boosting bite.

Strawberry Swirl Crumble Bars (Collagen‑Infused)

why you’ll Love Them