Buttery shortbread, a layer of bright raspberry jam, and a crumbly top that bakes into golden clusters make these cookies hard to stop at one square. They’ve got the same bakery-case feel as the Costco favorite, but the homemade version gives you a thicker jam layer and a fresher, cleaner buttery finish that tastes better the moment they cool.
The trick is keeping the butter cold until the dough is just barely mixed. That’s what gives the top its sandy, craggy crumble instead of a cookie that bakes up flat and dense. The jam also matters more than people think: a thick raspberry jam stays put and bakes into a glossy center, while a thin one can leak into the base and make the whole pan too soft.
Below, I’ll walk you through the texture cues that tell you when the dough is ready, how to spread the jam without tearing the base, and the easiest way to cut clean squares once the cookies are fully cooled.
The jam layer set up beautifully and the crumble topping stayed sandy and buttery instead of turning into a cookie slab. I used a thick raspberry preserves and they cut into neat squares once cooled, just like the bakery kind.
These Costco-style raspberry crumble cookies bake up with the perfect jammy center and buttery shortbread crumb — save this one for the next time you want bakery squares without leaving home.
The Jam Layer That Can Make or Break These Cookies
The filling looks simple, but it’s the part that decides whether these bars bake up neatly or slide into a soft mess. Raspberry jam that’s too loose will soak into the shortbread base and turn the center muddy. A thicker jam or preserve gives you that bright, distinct layer that stays visible after baking.
The other place people trip up is the crumble topping. If the dough gets overmixed after the egg goes in, it turns pasty instead of crumbly. You want the mixture just combined, then broken into loose clumps over the jam so it bakes into a jagged, golden top instead of a smooth lid.
What Each Ingredient Is Actually Doing in This Dish
- All-purpose flour — This is the structure for both the base and the crumble. It gives the cookies enough body to hold the jam without going cakey. Don’t swap in cake flour here; it’s too soft. If you need a gluten-free version, use a 1:1 baking blend that contains xanthan gum.
- Granulated sugar — Sugar sweetens the cookie, but it also helps the shortbread bake with crisp edges. The little bit in the dough balances the tart jam without making the squares cloying.
- Cold unsalted butter — Cold butter is the whole reason the topping stays crumbly. As it melts in the oven, it creates those sandy pockets and tender layers. Salted butter works in a pinch, but reduce the added salt a little if you use it.
- Egg — The egg binds the dough just enough so the bottom layer presses together cleanly. Without it, the base would be too sandy to slice.
- Vanilla extract — Vanilla rounds out the butter and jam so the cookies taste bakery-made instead of one-note sweet. Use real vanilla if you can; it shows up here.
- Raspberry jam — This is where the flavor lives, so choose a jam you’d eat straight from the spoon. A thicker preserve holds its shape best and gives the cleanest cut. If your jam is loose, stir in a spoonful of chia seeds or simmer it briefly to thicken before spreading.
- Powdered sugar — The dusting gives the finished cookies that classic Costco-style look and a little extra sweetness on top. Add it after the cookies are fully cool or it will melt into the surface.
Building the Base Without Turning the Dough Tough
Cutting in the Butter
Start by whisking the dry ingredients, then work the cold butter in until the mixture looks like uneven crumbs with a few larger pea-size pieces. Those bigger bits matter because they melt into the dough and create a more tender, craggy texture. If the butter softens too much, the dough smears instead of crumbling, and the baked cookie turns heavy.
Bringing the Dough Together
Beat in the egg and vanilla just until the mixture clumps when you squeeze it. Stop there. Overmixing after the egg goes in develops too much structure and takes away the sandy shortbread bite. The dough should feel soft but not sticky, like it can be pressed into a pan without spreading on its own.
Layering and Baking
Press two-thirds of the dough into an even layer on the parchment-lined pan, then spread the jam all the way to the edges in a thin, even layer. Crumble the remaining dough over the top in loose clumps, leaving some jam visible so the top bakes with contrast. Bake until the edges are golden and the center looks set, not wet; if you pull it too early, the middle stays underbaked and won’t slice cleanly.
Three Ways to Make These Cookies Fit What You’ve Got
Use another fruit jam
Strawberry, apricot, or blackberry jam all work here. Keep the same amount, but choose a thick preserve rather than a thin spread so the filling stays layered instead of soaking into the base. The flavor changes, but the texture should stay the same.
Make them gluten-free
A good 1:1 gluten-free flour blend can replace the all-purpose flour without changing the method. The dough may feel a little more delicate, so press it into the pan with a light but even hand. Let the cookies cool fully before cutting or they’ll crumble apart.
Add a citrus edge
A little lemon zest in the dough wakes up the raspberry without changing the bakery-style texture. Stir it into the dry ingredients so it spreads evenly. The cookies taste brighter and a little less sweet, which works well if your jam is very rich.
Storage and Reheating
- Refrigerator: Store in an airtight container for up to 5 days. The crumble softens a little as it sits, but the flavor stays great.
- Freezer: These freeze well once cut. Layer them between parchment in a sealed container for up to 2 months, then thaw at room temperature.
- Reheating: These are best at room temperature, not warm. If you want the edge a little fresher, let them sit out for 10 to 15 minutes after chilling instead of microwaving, which can melt the jam and make the topping greasy.
Answers to the Questions Worth Asking
Raspberry Crumble Cookies (Costco Copycat)
Ingredients
Equipment
Method
- Preheat the oven to 350°F and line a sheet pan with parchment paper.
- Whisk together the all-purpose flour, granulated sugar, and salt, then cut in the cold unsalted butter until coarse crumbs form.
- Beat in the large egg and vanilla extract until the mixture just comes together into a soft dough.
- Press two-thirds of the dough into an even layer on the prepared sheet pan, then spread the raspberry jam evenly over the top.
- Crumble the remaining dough over the jam in loose clumps, leaving some jam visible.
- Bake at 350°F for 25–28 minutes, until golden.
- Cool completely, dust with powdered sugar, and cut into squares.
