A bright lemon and a jar of blackberry jam needed to be used up today. I grabbed what I had on the counter and turned them into these lemon blackberry cookies that finish with a creamy blackberry frosting. My daughter helped mash the berries and insisted on “extra lemon” her way.
Why You’ll Love This Delish Lemon Blackberry Crumbl Cookies
I noticed that a touch of lemon keeps the dough tender and bright while the blackberry adds a mellow jammy finish. When I make these, the texture contrast between the soft cookie and creamy frosting always wins over the picky crowd at my kitchen table.
My practical baking observation: using chilled dough helps the cookies hold their shape and keeps them thick and soft in the middle. That little step makes a big difference when you want consistent, bakery-sized results without fuss.
What Makes this Recipe Unique
– Affordability: Uses simple pantry staples and a bit of jam to get big flavor without specialty ingredients.
– Key ingredient: Fresh lemon zest brightens the whole cookie and balances the jammy blackberry frosting.
– Simple method: Straightforward creaming and folding, no fancy techniques required.
– Speed/shortcut benefit: A brief chill firms the dough so you can make large cookies that stay thick while baking.
– Texture and flavor: Soft, buttery cookie with a creamy, slightly tangy frosting and a jammy pop on top.
Estimated Macros & Calories
A rough idea of the nutrition for one cookie, based on the recipe ingredients. (estimated per serving, without optional ingredients)
- Calories: 470
- Protein: 5 g
- Carbohydrates: 53 g
- Fat: 32 g
- Fiber: 2 g
The Most Authentic Delish Lemon Blackberry Crumbl Cookies Recipe
Direct and matter-of-fact: this follows the recipe steps from start to finish and keeps things approachable for a family kitchen.
Ingredient Notes
– Unsalted butter: Gives the cookies their rich, tender crumb; soften it for easier creaming and don’t skip using unsalted so you can control seasoning.
– Granulated and powdered sugar: Granulated for structure, powdered for tenderness in the dough and frosting; sifted powdered sugar prevents lumps.
– Fresh lemon zest and juice: Adds brightness and a bit of lift; fresh zest makes a noticeable difference over bottled.
– All-purpose flour: The backbone for texture; measure gently and avoid overmixing once the flour goes in.
– Egg: Binds the dough and helps with rise; room temperature works best for even mixing.
– Baking powder and fine sea salt: Small amounts do a lot — the powder helps with a bit of lift and the salt rounds flavors.
– Poppy seeds (optional): An optional little crunch and visual interest; leave them out if you prefer.
– Cream cheese: Makes the frosting tangy and creamy; soften it so it creams smooth with the butter.
– Blackberries (mashed and strained): Fresh berry puree gives true blackberry flavor once strained to remove seeds.
– Blackberry jam: A spoonful on top brings glossy, concentrated berry notes; homemade or store-bought both work.
– Flaky sea salt (optional): A tiny finishing pinch enhances the sweet and tart flavors if you like that contrast.
Instructions
Step 1: Preheat the oven
Heat the oven to the temperature called for in the recipe and line a baking sheet with parchment. Have a cooling rack nearby to finish the cookies after they come out.
Step 2: Cream the butter and sugars
Beat the softened butter with the granulated sugar and powdered sugar until the mixture is light and fluffy and the sugars are incorporated. Using an electric mixer makes this quick and smooth.
Step 3: Add the wet ingredients
Mix in the egg, fresh lemon juice, and lemon zest until everything is fully incorporated and the dough looks smooth. Scrape the bowl so nothing is left on the sides.
Step 4: Combine the dry ingredients
Whisk the flour, baking powder, and salt in a separate bowl, then fold the dry mix into the wet until no streaks of flour remain. If using poppy seeds, stir them in gently and stop as soon as the dough is uniform.
Step 5: Portion the dough
Scoop the dough into large mounds on the prepared sheet so they have room to bake and press each mound gently to a thick disk. These are meant to stay on the thick side rather than spreading thin.
Step 6: Chill briefly
Place the tray in the refrigerator until the dough firms slightly; this step helps the cookies keep their shape during baking. A short chill is all you need.
Step 7: Bake until set
Bake the cookies until the edges are set and the tops turn a light golden color, rotating the pan once during baking for even color. Remove the sheet and allow the cookies to cool briefly on the pan before moving them to a rack.
Step 8: Prepare the blackberry puree
Mash the blackberries and press them through a fine-mesh sieve to remove seeds, keeping the smooth juice for the frosting. If the puree is very loose, reduce it briefly on the stove until slightly concentrated, then cool.
Step 9: Make the blackberry cream cheese frosting
Beat the softened cream cheese and softened butter until smooth, then gradually add the powdered sugar until creamy. Stir in the strained blackberry puree, a bit of lemon zest, and vanilla, beating just until the frosting is light and fluffy.
Step 10: Frost and finish
Spread or pipe a generous layer of the blackberry cream cheese frosting onto each cooled cookie, then top each with a spoonful of blackberry jam and, if you like, a small pinch of flaky sea salt. The jam gives a glossy finish and extra berry sweetness.
Step 11: Serve or chill to set
Serve right away or chill briefly to help the frosting set a bit before storing. Leftovers keep well when refrigerated.
Tips and Mistakes to Avoid
– Don’t overmix after adding flour; stop folding as soon as no flour streaks remain to keep cookies tender.
– Soften the cream cheese and butter for the frosting to avoid lumps; room temperature pieces beat into a silky finish.
– Chill the dough until it firms rather than hard freezing it; too cold and the cookies can bake unevenly.
– Strain the mashed blackberries well to avoid seed bits in the frosting—use a spoon to press through the sieve.
– Avoid skipping the lemon zest; the small amount lifts the whole flavor profile and keeps the cookie from tasting flat.
Storage Tips
Store finished cookies in an airtight container in the refrigerator for up to four days. For longer keeping, freeze unfrosted cookies and thaw before frosting, or freeze fully assembled cookies between layers of parchment for a short period. Bring chilled cookies to room temperature before serving for the best texture.
Variations and Substitutions
– Swap the optional poppy seeds for a little extra lemon zest if you want more citrus brightness.
– If you prefer a stronger jam note, use a thicker blackberry conserve on top instead of a thinner jam.
– This recipe relies on wheat flour and dairy, so it isn’t naturally gluten-free or dairy-free without specific substitutions.
Why This Recipe Is The Real Deal
The charm here is in how few ingredients do most of the work: butter, flour, egg, lemon and a bit of blackberry turn into something everyone asks for again. I like making these when my daughter and I have berries to use up; she loves stirring the frosting and sampling along the way.
Simplicity wins in our kitchen. You don’t need special tools, just a little patience with chilling the dough and a sieve for the berry puree to get a clean, creamy frosting.
The Bottom Line
If you have lemon and blackberry needing to be used today, this recipe turns them into cozy, thick cookies with a creamy fruit frosting that the family will remember. Try them, tweak them a bit to your taste, and leave a note about how your batch turned out.
Billy Mackenzie
Founder of MerryDessert.com
Simple, joyful homemade desserts — sweet moments, made with love.
Delish Lemon Blackberry Crumbl Cookies
Ingredients
Cookie Dough
- 1/2 cup unsalted butter, softened
- 1/3 cup granulated sugar
- 1/4 cup powdered sugar for the dough
- 1 tsp fresh lemon zest
- 1 large egg, room temperature
- 1 tbsp fresh lemon juice
- 1 1/3 cup all-purpose flour
- 1/4 tsp fine sea salt
- 1 tsp baking powder
- 1 Tbsp poppy seeds (optional)
Blackberry Cream Cheese Frosting
- 3 oz cream cheese, softened
- 3 tbsp unsalted butter, softened
- 1/3 cup powdered sugar
- 1 tbsp fresh blackberries, mashed and strained strain to remove seeds
- 1/4 tsp fresh lemon zest
- 1/4 tsp vanilla extract
Finish & Garnish
- 1/4 cup blackberry jam homemade or store-bought
- 1/8 tsp flaky sea salt optional, for sprinkling
Instructions
Preparation Steps
- Heat the oven to 350°F and line a baking sheet with parchment paper. If you have a cooling rack ready, set it nearby.
- In a large bowl, beat the softened butter with the granulated and powdered sugars until the mixture is light and fluffy, about 2–3 minutes using an electric mixer on medium speed.
- Add the egg, lemon juice, and lemon zest to the butter-sugar mixture and mix until fully incorporated and smooth.
- Whisk together the flour, baking powder and salt in a separate bowl. Fold the dry ingredients into the wet mixture with a spatula just until no streaks of flour remain. If using, stir in the poppy seeds. Do not overmix.
- Using a 1/4-cup scoop (about 4 tablespoons), portion 6 mounds of dough onto the prepared sheet, spacing them well. Press each mound gently to flatten to about 3/4-inch thickness — these are large bakery-style cookies.
- Place the baking sheet in the refrigerator for 15–20 minutes to firm the dough slightly; this helps the cookies hold their shape during baking.
- Bake for 12 minutes, or until the edges are set and the tops are lightly golden. Rotate the pan once halfway through for even browning. Remove from oven and let the cookies cool on the baking sheet for 8 minutes before transferring to a rack to cool completely.
- While the cookies cool, prepare the blackberry frosting. Mash the blackberries and press through a fine-mesh sieve to remove seeds; you should have about 1 tablespoon of strained juice. If it’s very loose, simmer the juice in a small saucepan over low heat for 1–2 minutes to reduce slightly, then cool.
- Beat the softened cream cheese and butter together until smooth. Gradually add the powdered sugar and beat until creamy. Mix in the strained blackberry puree, lemon zest and vanilla, beating just until combined and fluffy.
- Spread or pipe a generous layer of the blackberry cream cheese frosting onto each cooled cookie. Top each with a small spoonful of blackberry jam and, if desired, a tiny pinch of flaky sea salt to accent the flavors.
- Serve immediately or chill for 10–15 minutes to set the frosting slightly. Store leftovers in an airtight container in the refrigerator for up to 4 days.
