Easy 4-Ingredient Rhubarb Strawberry Flat Pie

Rhubarb Strawberry Flat Pie

Easy 4-Ingredient Rhubarb Strawberry Flat Pie is about the most delicious you’ll make! And, the slices are big because it’s a flat pie! Yum!

Recipe for Strawberry Rhubarb Pie

An easy recipe is just what you need for a strawberry rhubarb pie. And, with only a few ingredients, you’re guaranteed a stunning tasty pie. 

Rhubarb Strawberry Flat Pie

Old Fashioned Strawberry Rhubarb Pie Recipe

Rhubarb by itself is exceptionally tart. And, most people find it not really great to eat. This strong sour flavor has to be offset with sugar in order to use the beautiful rhubarb stems. 

Strawberry Rhubarb Slab Pie

Rhurbarb is a vegetable. And, its stems look like a reddish crimson celery. Unlike celery, you’re unlikely to just slice these stems and eat them. You’re going to need to cook the rhubarb and you will need sweetener. 

It’s very important to know that the leaves of rhubarb are very poisonous! Do NOT eat them. They’re high in oxalic acid, which can quickly cause kidney failure in humans. 

Rhubarb Strawberry Flat Pie

Amish Strawberry Rhubarb Pie Recipe

Amish strawberry rhubarb pie typically has a custard in it. Made from eggs, cream and sugar, the custard helps with mellowing the sour tart taste of the rhubarb. And, the naturally sweet strawberries add even more delight. 

Strawberry Rhubarb Pie

When strawberries are in season, this is the pie to make. And, making it a ‘flat’ pie is even more effortless with your baking. 

Honestly, this flat pie is like a ‘pizza’ but it’s a sweet delicious ‘pie’! Just shift your thinking about what really makes a pie a pie. 

Another thing, you can have even a larger slice because it’s flat and is basically fruit. 

Easy Pie Crust Recipes

For me, easy pie crusts are a must when baking. Sure I can make my pie crust from scratch. And, I have. But, refrigerated pie crusts can be a very close second to homemade. And, they save some serious time, energy and mess.

For this recipe, I really think the puff pastry is the way to go. If you want to use homemade pie dough or even a refrigerated pie dough that would work, too. 

So, see, you have options! 

Simple 6-Ingredient Fresh Fruit Tart

No Churn Strawberry Ice Cream

Aussie Lamb Strawberry Arugula Pizza

No Bake Strawberry Dessert

Strawberry Custard Pie

Rhubarb Desserts

Rhubarb desserts don’t have to be complicated. 

Here are some simple ideas for using rhubarb in desserts and other dishes. 

  • Simply simmer your sliced rhubarb in some water and sugar. You could actually use the first part of this recipe where we make a ‘jammy’ rhubarb for the recipe. Serve over ice cream.
  • Make a simple syrup (about 2 cups sliced rhubarb + 1 1/2 cups water + 3/4 cup sugar) with the sliced rhubarb. Simmer about 8-10 minutes. Strain off the rhubarb from the liquid. Then use in a mocktail or cocktail of your choice. 
  • Use roughly ground rhubarb stems (slice rhubarb and pulse in food processor) in an apple or banana bread recipe. 
  • Finely dice up rhubarb stems and use in your scone recipe! Here are some of my scone creations! 
  • Make a simple rhubarb ‘jam’ (rhubarb + water + sugar + lemon juice) and serve with chicken and pork. 

Rhubarb Strawberry Flat Pie

Rhubarb and Strawberry Recipes

While strawberry seems to be the natural partner of rhubarb, don’t forget that it can be paired with other things: apples, figs, pears, bananas and more. 

Rhubarb Raspberry Mint Sauce

Blueberry Rhubarb Crumble

Strawberry Rhubarb

Lest we not forget that rhubarb stems are exceptionally nutritious. Full of calcium, manganese, vitamins C, and K, fiber and those glorious antioxidants. Rhubarb also has been found to help digestion! 

When you cook rhubarb, it essentially falls apart into translucent fibers. And, its juices thicken nicely. That means it’s perfect for chutneys and pairing with other fruits like peaches. 

If you’re lucky enough to find rhubarb year-round, then you’ll enjoy experimenting with many recipes. Otherwise, look for it from about April through July

Rhubarb Strawberry Flat Pie

Rhubarb Strawberry Flat Pie

Easy 4-Ingredient Rhubarb Strawberry Flat Pie


  • Preheat oven to 375
  • 2 ½ cup fresh rhubarb, cut into small pieces
  • 1 cup + 2 Tbl. coconut sugar, divided
  • 1 package puff pastry, room temperature, stretch to about 12 x 16”
  • 16 oz. fresh strawberries, cleaned, hulled and sliced in halves
  • Egg white, optional


  1. Preheat oven to 375. Line a cookie sheet with parchment paper.
  2. Put the rhubarb, one-half cup water, one-half cup sugar in a saucepan over medium high heat. Blend and bring to boil. Reduce heat to low, cover with a lid, and let the rhubarb cook about 8-10 minutes until basically tender and in a thick ‘jammy’ consistency. Remove from blaze and cool completely.
  3. Place the puff pastry on it and gently stretch the dough.
  4. Spread the cooled rhubarb on the puff pastry leaving about one inch around the perimeter without rhubarb. Place the strawberries on top leaving the perimeter without strawberries. Sprinkle with one-half cup sugar.
    Pull up sides and crimp the dough all around the flat pie.
  5. Use a pastry brush and cover the exposed dough with egg white. Sprinkle on the remaining sugar on the dough.
  6. Bake in a preheated 375 oven for 40 to 45 minutes. Remove and cool thoroughly.

Your sharing is GOLDEN! Thank you!

Your sharing and comments help me stay in business! Share a photo if you make the recipe #allyskitchen Thank you! xo Ally

Rhubarb Strawberry Flat Pie

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  1. Faith Julian says:

    7/3/2022. Made this for my husband as he loves rhubarb and as a 4th of a July dessert. Mind you, I’ve never cooked or eaten rhubarb but I followed your recipe with a few exceptions: used a pre-made thin pizza crust and from another recipe of yours, I took a can of sweet condensed milk and 2 eggs, mixed those well as a layer between the crust and the rhubarb/strawberry mixture. My husband loved it and when I went to pack this up for the 4th of a July party, a few pieces were missing. Everyone loved this dessert and couldn’t believe I used a pizza crust and coconut sugar. Thank you for another fabulous recipe!

    1. Faith!!! Oh, me thinks that those pieces were the work of a ‘weetle food seeker’! Ha ha! I love love what you did. You made the custard w/the eggs and sweetened condensed milk. So simple and delicious! And, that pizza crust I think is perfect. I’m so glad you’re here, and, thank you, for taking time to share w/me. Don’t be a stranger! xoxx ally

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