Grandma Rampke's Easy Rhubarb Custard Pie

Prep: 15 minCook: 45 min1 piemedium
Grandma Rampke's Easy Rhubarb Custard Pie

A family custard pie featuring tart rhubarb baked under a silky egg-milk custard with warm cinnamon notes. This no-fuss recipe uses a simple pour-over method rather than tempering or blind baking, making it accessible for home cooks. The rhubarb softens into the filling while the custard sets into a creamy, delicate crumb. Serve warm or at room temperature with whipped cream. A multi-generational favorite passed down through the Rampke family for over 50 years, prized for its rustic simplicity and reliable results.

Ingredients

Yield: 1 pie
  • ½ pie crust, unbaked
  • 1 ½ cups rhubarb, cut into 1-inch pieces
    strawberries1.5 cups dicedswap

    high conf

    Full guide →
  • ½ cup sugar, divided
  • 2 eggs, large, beaten
    aquafaba3 tbsp per eggveganeggs-free

    lower conf

    Full guide →
  • ½ cup sugar
  • 1 cup milk, whole
    oat milk1:1 ratiodairy-freedairy-free

    moderate conf

    Full guide →
  • cinnamon, to taste(optional)

Instructions

  1. 1

    Place pie crust into pie plate.

  2. 2

    Distribute rhubarb pieces evenly in crust and cover with sugar.

  3. 3

    Whisk beaten eggs with remaining sugar and whole milk until combined.

  4. 4

    Pour custard mixture over rhubarb.

  5. 5

    Sprinkle cinnamon across top.

  6. 6

    Bake until custard sets and top is lightly golden, about 45 minutes.

  7. 7

    Cool completely before serving to allow custard to firm.

Tips

Tip 1

Use whole milk for the richest custard texture; skim milk produces a thinner, less creamy filling.

Tip 2

Cool completely before slicing so the custard fully sets and holds its shape cleanly.

Good to Know

Storage

Cover and refrigerate up to 3 days. Do not freeze (custard becomes grainy upon thawing).

Make Ahead

Prepare unbaked crust and measure dry ingredients the morning of baking. Assemble and bake same day for best texture.

Serve With

Serve at room temperature or lightly warmed with whipped cream or vanilla ice cream. Pairs well with tea or coffee.

See pairing guide →

Common Mistakes

Watch

Use skim milk to avoid a thin, watery custard that won't set properly.

Watch

Slice while hot to avoid custard cracking and separating.

Substitutions

Dairy-Free Swaps

milk
oat milk1:1 ratiodairy-freedairy-free

moderate conf

Full guide →

Vegan Options

eggs
aquafaba3 tbsp per eggveganeggs-free

lower conf

Full guide →

General Alternatives

rhubarb
strawberries1.5 cups dicedswap

high conf

Full guide →
Find more substitutions →

FAQ

Can I use frozen rhubarb?

Yes, thaw and drain excess liquid first to prevent a soggy filling. Pat dry with paper towels before adding to crust.

What if my custard doesn't set after 45 minutes?

Bake an additional 5-10 minutes until the center no longer jiggles when the plate is gently shaken. Overbaking slightly is better than underbaking.

How long does this keep?

Refrigerate up to 3 days covered. Do not freeze, as the custard texture becomes grainy. Eat at room temperature or warmed.