The Strawberry Rhubarb Pie That Actually Sets (No Soupy Slices)
A glossy, lattice-topped pie with a filling that holds its shape — because nobody wants pie soup on a plate.
Let me guess: you've made a strawberry rhubarb pie before, it looked absolutely stunning coming out of the oven, and then you cut into it and a red flood ran across the plate like a tiny fruit crime scene. Been there. The pie tasted incredible. It just had the structural integrity of soup. That ends today.
Here's the thing nobody tells you about strawberry rhubarb pie: the recipe isn't the hard part. Strawberries and rhubarb are both gorgeously, aggressively wet. If you don't deal with that water before it goes in the crust, you are baking a pie that is doomed before it ever sees the oven. The fix is three small steps most recipes skip — and once you know them, you'll never make a runny pie again.
This is the version I made on repeat until it came out right every single time: sweet-tart filling that slices into clean wedges, a flaky lattice top, and a glossy red center that holds its shape. It looks like you fussed for hours. You didn't. You just knew the trick. Let's get into it.
Jump to: Ingredients | The Secret to a Pie That Sets | Instructions | FAQ
Prep Time: 35 minutes | Cook Time: 55–65 minutes | Cool Time: 4 hours (non-negotiable — this is what sets it) | Total Time: about 5 hours 30 minutes
Yield: 1 (9-inch) pie · 8 slices
Difficulty: Intermediate (worth it)
WHY YOU'LL LOVE THIS PIE
It actually sets — clean slices, no red flood, no pie soup
Sweet-tart balance — the rhubarb keeps it from being a sugar bomb, the strawberries keep it from being a face-pucker
That lattice top — looks impressive, weaves easier than you think (I'll walk you through it)
Make-ahead friendly — it has to cool for hours anyway, so bake it the day before and look like a hero
Works with fresh OR frozen rhubarb — full instructions for both below
Ingredients
For the crust(or use 2 store-bought rolled crusts — zero shame here)
2½ cups all-purpose flour
1 tbsp granulated sugar
1 tsp salt
1 cup (2 sticks) cold unsalted butter, cubed
6–8 tbsp ice water
For the filling
3 cups rhubarb, trimmed and chopped into ½-inch pieces
3 cups fresh strawberries, hulled and quartered
¾–1 cup granulated sugar (use the full cup if your rhubarb is very tart)
¼ cup cornstarch (the thickener — do not skimp)
1 tbsp fresh lemon juice
1 tsp vanilla extract
¼ tsp salt
1 tbsp cold butter, cut into small pieces (to dot on top)
For finishing
1 egg, beaten (egg wash)
1–2 tbsp coarse sugar (for sparkle on the crust)
💡 Cold butter, cold water, cold everything. Warm butter is the enemy of a flaky crust. If your kitchen is hot, pop the cubed butter back in the freezer for 10 minutes before you start.
💡 Don't cut the cornstarch. A quarter cup looks like a lot. It is exactly enough. This is one of the three things standing between you and pie soup.
THE SECRET TO A PIE THAT SETS
Ninety percent of runny strawberry rhubarb pies fail for the same three reasons. Fix these and you're done:
1. Macerate and DRAIN the fruit. Toss your chopped strawberries and rhubarb with the sugar and let them sit for 30 minutes. They'll release a shocking amount of liquid. Pour that liquid off before the fruit goes in the crust. This is the single biggest difference between a pie that sets and a pie that swims.
2. Use enough thickener — and the right kind. Cornstarch is my go-to here because it sets up clear and glossy. The full ¼ cup is correct for this much fruit. (Prefer tapioca? Sub instructions are in the Substitutions section.)
3. Bake until the CENTER bubbles — then cool completely. Cornstarch only activates at a full boil, and the edges will fake you out by bubbling first. Wait until you see thick, slow bubbles in the middle of the pie. Then — and I cannot stress this enough — let it cool for at least 4 hours. The filling sets as it cools, not in the oven. Cut it warm and you'll cut into soup. Cut it cool and you'll cut clean wedges. Patience is the recipe.
Instructions
Make the crust
Mix the dry, cut in the butter. Whisk flour, sugar, and salt in a large bowl. Add the cold cubed butter and cut it in with a pastry cutter or your fingers until you have pea-sized pieces. You want visible bits of butter — that's what makes it flaky.
Add water, don't overwork. Drizzle in ice water 1 tablespoon at a time, tossing with a fork, until the dough just holds together when squeezed. Divide into two discs, wrap, and chill at least 1 hour (or while you prep the filling).
Make the filling
Macerate. Toss the chopped rhubarb and strawberries with the sugar in a large bowl. Let sit 30 minutes.
Drain. Pour the fruit into a colander and let the released liquid drain off completely. Give it a gentle shake. Don't rinse — just drain.
Thicken. Return the drained fruit to the bowl. Add cornstarch, lemon juice, vanilla, and salt. Toss until every piece is coated and no dry cornstarch remains.
Assemble
Roll the bottom crust. On a floured surface, roll one disc into a 12-inch circle. Lay it into a 9-inch pie dish and trim the overhang to about ½ inch. Pour in the filling and dot the top with the small pieces of cold butter.
Lattice the top. Roll the second disc and cut it into ¾-inch strips. Lay half the strips across the pie in one direction, then weave the remaining strips perpendicular, lifting alternating strips as you go. (Not weaving today? A solid top crust with 4–5 vent slits works perfectly.) Trim, fold the edges under, and crimp.
Egg wash and sugar. Brush the lattice with beaten egg and sprinkle with coarse sugar.
Bake
Start hot. Bake at 425°F for 20 minutes to set the crust. Place a baking sheet on the rack below to catch any drips.
Drop the heat and finish. Reduce to 375°F and bake 35–45 minutes more, until the crust is deep golden and the filling is bubbling thickly in the center. If the edges brown too fast, tent them with foil.
COOL COMPLETELY. Transfer the pie to a wire rack and let it cool at least 4 hours, or overnight. I know. Do it anyway. This is the step that makes it slice clean.
RHUBARB PREP & SAFETY
A Quick Word on Rhubarb
If you're new to rhubarb, two things:
The leaves are toxic — the stalks are not. Rhubarb leaves contain oxalic acid and should never be eaten. Most rhubarb at the store comes with leaves already removed, but if yours has any, trim and discard them. The pink-and-green stalk is the only part you want.
You don't need to peel it. Just trim the dry ends and any tough stringy bits, then chop. Younger, thinner stalks are the most tender; if yours are thick and fibrous, a quick peel of the outer layer doesn't hurt.
FRESH vs FROZEN RHUBARB
Can I Use Frozen Rhubarb?
Yes — and a lot of you will need to, since fresh rhubarb has a short season. Two adjustments:
Don't fully thaw it before measuring, but do let it thaw enough to drain. Frozen rhubarb holds even more water than fresh, so this matters.
Thaw, then drain it hard. Let it sit in a colander until it stops dripping, and press out the extra liquid with a paper towel. Then proceed with the macerate-and-drain step as written. Some bakers add an extra tablespoon of cornstarch when using frozen — if your rhubarb seemed especially wet, do it.
Everything else stays the same.
TIPS & NOTES
Chill the assembled pie before baking if your kitchen is warm and the butter softened during assembly. 15 minutes in the fridge keeps the crust flaky.
Always bake on a sheet pan. Fruit pies bubble over. A sheet pan below saves your oven floor and your sanity.
Watch for center bubbling, not edge bubbling. The middle is the last to come to temp, and the cornstarch needs that heat to activate.
Cool on a rack, not the counter. Air circulation underneath stops the bottom crust from steaming and going soggy.
Substitutions & Swaps
Cornstarch → instant tapioca: Use 3 tablespoons of instant (quick-cooking) tapioca in place of the cornstarch. It sets slightly softer and a touch more "jammy." Let the thickened filling sit 15 minutes before assembling so the tapioca starts absorbing.
Cornstarch → flour: In a pinch, sub 6 tablespoons of all-purpose flour. It works but sets cloudier and less glossy than cornstarch.
Strawberry/rhubarb ratio: This recipe is a balanced 1:1. Want it tarter and more "classic"? Go 4 cups rhubarb to 2 cups strawberries. Sweeter and more kid-friendly? Flip it.
Store-bought crust: Completely fine. Use two rolled (not pressed) refrigerated crusts so you can still lattice.
STORAGE & MAKE-AHEAD
Room temp: A fully cooled, baked pie keeps at room temperature, loosely covered, for up to 2 days.
Fridge: After that, refrigerate up to 4 days. The filling firms up even more cold — a quick 10 minutes at room temp before serving softens it back up.
Make-ahead (best move): Bake it a full day ahead. It has to cool for hours anyway, and an overnight rest gives you the cleanest slices you'll ever cut.
Freezing baked: Cool completely, wrap well, freeze up to 3 months. Thaw overnight in the fridge, then warm in a 300°F oven to re-crisp the crust.
Freezing unbaked: Assemble the whole pie, freeze solid, then bake from frozen — add about 20 minutes to the bake time and don't skip the foil tent.
Frequently Asked Questions
Why is my strawberry rhubarb pie runny? Almost always one of three things: the fruit wasn't macerated and drained first, there wasn't enough thickener, or the pie was cut before it fully cooled. The filling sets as it cools — cutting warm guarantees soup.
How long does strawberry rhubarb pie need to cool before cutting? At least 4 hours, and overnight is even better. This is the step everyone wants to skip and the one that matters most for clean slices.
Can I use frozen rhubarb? Yes. Thaw it, drain it hard, and press out the extra moisture before macerating. Consider adding an extra tablespoon of cornstarch if it's especially watery.
Do I need to peel rhubarb? No — just trim the ends and any tough strings. Peel only if the stalks are very thick and fibrous.
What's the best strawberry to rhubarb ratio? A 1:1 ratio is balanced and crowd-friendly. For a tarter, more traditional pie, lean toward more rhubarb (4:2).
Cornstarch or tapioca — which is better? Cornstarch sets clear and glossy and is the easiest to get right. Tapioca sets a little softer and more jammy. Both work; the recipe is written for cornstarch.
If You Liked This, Try These Next
Strawberry Frozen Yogurt Bites — More fresh strawberry goodness, no oven required.
Dirt Pudding Cups — A no-bake, crowd-pleasing dessert for your next cookout.
Browse all our Desserts & Sweet Treats → for more sweet ideas.
Planning a summer spread? Pair this with our easy summer meals and finish strong with pie.
