
This homey rhubarb cobbler turns sharp spring stems into a simmering, sweet-sour treat topped with soft buttermilk biscuits. The mix of jammy rhubarb base and golden, sugar-dusted biscuit crown makes a down-home dessert that nicely blends fancy and cozy.
I came across this dish during my first spring at our new place when the rhubarb stand went crazy with red stalks faster than I could pick them. These days it's our trusted sign that summer's on its way.
Ingredients
- Rhubarb: Four cups of fresh cut stalks make up the heart of this treat. Go for stiff bright red pieces with no softness or wrinkling.
- Sugar: Three quarters cup sugar cuts the natural sourness of rhubarb without making it too sweet. Regular granulated works best.
- Water: Added in small amounts to help make the filling without excess liquid.
- Cornstarch: This helps thicken everything to a nice jam-like texture. Always stir it with cold water before adding to stop clumps.
- Flour: All purpose flour builds the base for a soft biscuit layer.
- Cold butter: Tiny bits of cold butter make steam pockets while cooking which gives you flaky biscuits.
- Baking powder: Gives the right lift for puffy and light biscuit covering.
- Egg: A single beaten egg adds depth and holds the biscuit mix together.
- Buttermilk: Its gentle tang softens the dough and brings a nice flavor that works well with the tart rhubarb.
Simple Cooking Steps
- Heat your oven:
- Start by turning your oven to 400°F so it gets hot while you work on the rest of the recipe.
- Soften the rhubarb:
- Mix cut rhubarb with sugar and a splash of water (about 2 tablespoons) to keep it from burning. Let it come to a boil on medium high heat then lower to a gentle bubble. Cook for 4 to 5 minutes until the pieces start to break down but still keep some shape. You don't want mush, just tender chunks.
- Make it saucy:
- Mix cornstarch with a quarter cup of cold water in a small cup until smooth. Grab some hot juice from the rhubarb pot and mix it into your cornstarch blend to warm it up. Pour this mix back into the pot and keep stirring as it heats up again. Cook for 1 to 2 more minutes until it gets thicker, then turn off the heat. The sauce should stick to your spoon but still flow easily.
- Mix your topping:
- In a bowl, stir together flour, one third cup sugar and baking powder. Drop in small chunks of cold butter. Use your fingers or a fork to rub the butter into the dry stuff until you get something that looks like rough sand with some bigger butter bits. This step makes your biscuits nice and flaky.
- Add wet stuff:
- Beat an egg in a cup, then pour in the buttermilk and stir them together. Add this to your flour-butter mix and stir lightly with a fork just until it comes together. Don't stir too much or your biscuits will turn out tough.
- Put it together:
- Pour your warm rhubarb mix into a 1 and a half quart baking dish, spreading it out flat. Take big spoonfuls of the biscuit mix and drop them onto the fruit in six roughly even mounds. Leave gaps since they'll grow while baking. Sprinkle the last tablespoon of sugar over the biscuit tops.
- Bake it right:
- Put your dish in the hot oven and cook for 20 to 25 minutes. You'll know it's done when the biscuits turn golden on top and look fully cooked, and the fruit below is bubbling around the edges.

My grandma always threw in a tiny bit of ground ginger in her rhubarb cobbler, which I add sometimes for a warm flavor that goes well with the tartness. This dish takes me back to spring days on her porch with baking smells floating through the air and everyone waiting for it to cool just enough to dig in.
Seasonal Variations
Rhubarb is best in spring and early summer but this cobbler works great with other fruits too. During mid-summer try mixing half rhubarb and half strawberries for a classic combo. Later on, try peaches, blueberries or blackberries using the same steps. Just tweak the sugar based on how sweet your fruit naturally is.
Serving Suggestions
This cobbler tastes best when served warm about 15 minutes after taking it out of the oven. For the best treat, add a scoop of vanilla ice cream on top which gets a bit melty and makes a creamy sauce with the filling. For breakfast or brunch, try it with a spoonful of Greek yogurt instead. It also tastes great with afternoon coffee or tea as a sweet snack.
Storage and Reheating
Keep any extra cobbler covered in your fridge for up to three days. The biscuit top will get a bit soft but still tastes good. To warm up single servings, pop them in the microwave for 30 to 45 seconds. If you want to reheat more at once, put it in a 350°F oven for about 10 minutes until hot throughout. Don't try freezing this after it's baked as the biscuits get mushy.

Frequently Asked Questions
- → Can frozen rhubarb replace fresh?
Absolutely! Just thaw it first, then drain off the extra liquid to avoid a watery bottom layer.
- → What’s a buttermilk substitute?
If buttermilk’s not on hand, stir 1 tablespoon of lemon juice or vinegar into milk, then let it sit a couple of minutes before using.
- → How do I keep topping soft?
Don’t overmix the dough. A gentle touch stops it from turning too dense. Work it lightly for a soft and fluffy topping.
- → What pairs well with rhubarb?
Strawberries, raspberries, or even apples add a nice hint of sweetness that balances rhubarb’s tang nicely.
- → How do I store leftovers?
Pop leftovers in an airtight container and refrigerate for up to three days. To reheat, warm it in the oven or microwave.