Jammy, sweet-tart plums under a buttery pecan oat topping with a secret pinch of cardamom — this plum crisp is the summer dessert nobody makes enough of, and I'm on a mission to change that.
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For more summer fruit desserts, check out my Blueberry Peach Crisp, Rhubarb Crisp, and Peach Dump Cake.
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Plum crisp might be the most underrated summer dessert on the internet — and I'm on a mission to change that. Plum desserts don't get nearly enough attention compared to peach and berry, but sweet, jammy plums baked under a buttery pecan oat topping with a secret touch of cardamom — this is the dessert I bring to dinner parties when I want people to ask for the recipe. And they always do.
What makes this plum crisp with oats special is the combination of the pecan topping and the cardamom. Most plum dessert recipes use just cinnamon. The cardamom adds a floral, slightly citrusy warmth that has a natural affinity with plums — people can't place it, but they know something is different. As someone who's been baking since I was 13, I've made a lot of fruit crisps.
For more stone fruit and summer dessert recipes: Fresh Cherry Cake, Fresh Apricot Cobbler, and Cast Iron Peach Cobbler.
What Makes This Plum Crisp Different
The pecan oat topping — most crisp toppings are just oats, flour, butter, and sugar. Adding chopped pecans changes everything. They toast as the crisp bakes, getting nutty and slightly caramelized from the brown sugar. The texture is crunchier, more complex, and more interesting than a plain oat topping.
The cardamom — it's listed as optional in the recipe card but I strongly recommend it. Cardamom and plums are a natural pairing — the spice is floral and warm in a way that makes the filling taste more sophisticated without being fussy. Add it.
The lemon juice — just a tablespoon, but it brightens the filling and balances the sweetness in a way that keeps the whole thing from tasting one-dimensional.
Important Ingredients and Substitutions
Plums — Red or black plums work best. Look for plums that yield slightly to gentle pressure — ripe but not mushy. Slightly underripe plums work well too since the sugar and baking soften them. No need to peel — the skin softens completely during baking and adds beautiful color and a subtle tartness.
Cardamom — Optional in the recipe card but worth using. Ground cardamom pairs beautifully with plums. Start with ¼ teaspoon — it's a strong spice.
Cold coconut oil or butter — Both work. Coconut oil gives a very slightly tropical note and keeps it dairy-free. Butter gives a richer, more classic flavor. Either way, keep it cold — cold fat = crispier topping.
Rolled oats — Use old-fashioned rolled oats, not instant. Instant oats make the topping mushy instead of crispy.
Pecans — Walnuts or almonds substitute well. Skip entirely for a nut-free version.
Recipe Variations
This plum crisp recipe is easy to adapt — here are the versions worth trying:
- Plum Peach Crisp — Replace half the plums with diced fresh peaches. The sweet-tart combination is a summer standout.
- Plum Blueberry Crisp — Add 1 cup of fresh blueberries to the plum filling. Beautiful color and added tartness.
- Extra Spiced — Add ¼ teaspoon of ground ginger to the filling alongside the cinnamon and cardamom.
- Gluten-Free — Swap the all-purpose flour in both the filling and topping with a 1:1 GF flour blend and use certified GF oats.
- Almond Topping — Swap pecans for sliced almonds and add ¼ teaspoon of almond extract to the filling for a Scandinavian-inspired twist.
For fall-forward crisp recipes, check out my Apple Crisp and Pear Crisp.
How to Make Plum Crisp
For the complete recipe and measurements, scroll to the recipe card at the bottom of this post.
Prepare: Preheat the oven to 350°F. Spray a 2-quart baking dish (8x8-inch pan) with non-stick cooking spray.
Step 1: In a large bowl, combine the chopped plums, flour, cinnamon, cardamom, sugar, and lemon juice. Toss until just combined.
Step 2: Pour the plum mixture into the prepared baking dish.
Step 3: In a medium bowl, whisk together the oats, flour, salt, brown sugar, and cinnamon.
Step 4: Add the cold coconut oil or butter. Cut in with a fork or pastry cutter until the mixture resembles coarse pebbles. Stir in the chopped pecans.
Step 5: Sprinkle the crisp topping evenly over the plums.
Step 6: Bake for 45–50 minutes until the fruit juices are bubbling around the edges and the topping is deep golden brown. If the topping browns too quickly, tent loosely with foil. Cool on a wire rack for at least 30 minutes before serving.
Chelsea's Recipe Pro-Tips
- Don't skip the cardamom — Even a small pinch adds a floral depth that makes people wonder what's in there. It's the detail that elevates this from a good to a great crisp.
- Cold fat = crispy topping — Whether using coconut oil or butter, keep it cold until you're ready to use it. Cold fat creates a crispier, more textured topping. Room temperature fat makes it dense and clumpy.
- Wait for the bubble — The crisp is done when the fruit juices are actively bubbling around the edges, not just gently warming. This tells you the filling has reached the right temperature and thickened properly.
- Rest before serving — Let the crisp cool at least 30 minutes on a wire rack before serving. I know — patience is hard. But the filling thickens significantly as it cools and you'll get cleaner, saucier servings instead of a pool of hot fruit juice.
- Make it ahead — Plum crisp is actually better the next day as the flavors deepen overnight. Bake completely, cool, cover, and refrigerate. Reheat at 350°F for 10–15 minutes to re-crisp the topping before serving.
Storage Directions
- Refrigerating: Store in an airtight container in the refrigerator for up to 5 days.
- Freezing: Cool completely, then freeze in a freezer-safe container or wrapped tightly in plastic wrap and foil for up to 3 months. Thaw overnight in the refrigerator.
- Reheating: Reheat at 350°F for 5–10 minutes to re-crisp the topping. Microwave works for individual portions but the topping won't be as crispy.
Serving Suggestions
This plum crisp is wonderful warm with a big scoop of vanilla ice cream — the cold cream against the hot jammy filling is the combination. It's also excellent at room temperature for picnics, potlucks, and summer cookouts. For a lighter option, a dollop of Greek yogurt works beautifully and adds a nice protein hit. Pair it with a Blackberry Bourbon Smash — the two together make a pretty perfect summer evening.
Plum Crisp Recipe FAQs
Plum crisp and plum crumble are nearly identical with slightly different toppings. A crisp topping contains oats, giving it a crunchier, more textured finish. A crumble topping is typically flour-based without oats, resulting in a softer texture. This plum crisp uses rolled oats and pecans for maximum crunch.
The crisp is done when the fruit filling is actively bubbling around the edges and the oat topping is deep golden brown. If the topping browns before the filling bubbles, cover loosely with foil and continue baking. Always rest 30 minutes before serving — the filling thickens significantly as it cools.
No — don't peel your plums. The skin softens completely during baking and adds beautiful color and a slight tartness that balances the filling. Simply wash, pit, and chop. The skin also contains antioxidants — bonus.
Red or black plums work best — they're sweeter and hold their shape better than yellow plums. Look for plums that yield slightly to gentle pressure. Slightly underripe plums work well too as the sugar and heat soften them during baking. Avoid overripe plums as they release too much liquid.
Yes — don't thaw them first. Add 10–15 extra minutes of baking time and expect a slightly juicier filling.
Yes — but for the crispiest topping, keep the filling and topping separate and refrigerate them covered overnight. Layer the topping over the filling just before baking. Baking the assembled crisp fresh gives you the best texture.
Refrigerated in an airtight container for up to 5 days. Frozen for up to 3 months.
Yes — cool completely and freeze in a freezer-safe container for up to 3 months. Thaw overnight in the refrigerator, then reheat at 350°F for 10–15 minutes.
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Recipe Card
Plum Crisp (Buttery Pecan Oat Topping & So Easy!)
Ingredients
Plum Filling
- 6 cups pitted and chopped plums
- 3 tablespoons all-purpose flour
- ¾ teaspoon ground cinnamon
- ¼ teaspoon ground cardamom optional but recommended
- ¼ cup sugar cane or granulated sugar
- 1 tablespoon lemon juice
Pecan Oat Crisp Topping
- ¾ cup old-fashioned rolled oats
- ¼ cup all-purpose flour or whole wheat pastry flour
- Large pinch salt
- ¼ cup packed light brown sugar or additional cane sugar
- ¾ teaspoon ground cinnamon
- ¼ cup cold coconut oil or butter chopped into small pieces
- ⅓ cup chopped pecans
Instructions
- Preheat oven to 350°F. Spray a 2-quart baking dish (8x8-inch) with non-stick cooking spray.
- In a large bowl, combine plums, flour, cinnamon, cardamom, sugar, and lemon juice. Toss until just combined. Pour into prepared baking dish.
- In a medium bowl, whisk together oats, flour, salt, brown sugar, and cinnamon.
- Add cold coconut oil or butter. Cut in with a fork or pastry cutter until mixture resembles coarse pebbles. Stir in pecans.
- Sprinkle crisp topping evenly over the plums.
- Bake 45–50 minutes until fruit juices bubble around the edges and topping is deep golden brown. Tent loosely with foil if topping browns too quickly.
- Cool on a wire rack for at least 30 minutes before serving.
Notes
- Cardamom — optional but worth using. It pairs beautifully with plums and adds a subtle floral depth.
- Taste the filling — adjust sugar to taste before baking if plums are very tart.
- Cold fat — keep coconut oil or butter cold for the crispiest topping.
- Don't peel the plums — the skin softens completely during baking.
- Frozen plums — use straight from the freezer; add 10–15 extra minutes of bake time.
- Gluten-free — use a 1:1 GF flour blend in both the filling and topping, and certified GF oats.
- Storage — refrigerate 5 days, freeze up to 3 months.
- Adjust the sweetness as needed. Sample the plum filling before adding it to the pan. If it's too tart for your liking, add an extra tablespoon of sugar or two.
- Don't over- or under-bake. You'll know the crisp is done baking when the plum filling starts to bubble around the edges, and when the crisp topping is a beautiful golden brown. If you're noticing the top is browning too quickly, cover it loosely with aluminum foil.
- Cool slightly before serving. I recommend letting the crisp cool at least 30 minutes on a wire rack before enjoying, to let the sauces thicken as it cools. I know, patience is hard, but it's worth it here!
