Extra Moist Butter Cake with Yogurt - Easy Square Cake Recipe

Prep: 15 minCook: 40 min1 cake (16 slices)mediumAmerican
Extra Moist Butter Cake with Yogurt - Easy Square Cake Recipe

This tender butter cake gets its exceptional moisture from plain yogurt, creating a rich, soft crumb that stays fresh for days. The classic vanilla flavor and golden exterior make it perfect for afternoon tea, birthday celebrations, or as a base for frosting and decorations. What sets this version apart is the low baking temperature and yogurt addition, which prevents the cake from drying out while developing a beautiful golden color.

Ingredients

Yield: 1 cake (16 slices)
  • 1 cup all-purpose flour
    almond flour1:1gluten-freegluten-free

    Note: cake will be denser

  • 1 teaspoon baking powder
  • ½ teaspoon salt
    vegan butter1:1vegandairy-freedairy-free

    Works well for plant-based version

    Full guide →
  • 1 cup unsalted butter, softened
    vegan butter1:1vegandairy-freedairy-free

    Works well for plant-based version

    Full guide →
  • 1 cup granulated sugar
    coconut sugar1:1unrefined

    Adds subtle caramel notes

    Full guide →
  • 4 large eggs
  • 4 tablespoons plain yogurt
    sour cream1:1tangy

    Adds similar moisture with slight tang

    Full guide →
  • 1 teaspoon vanilla extract

Instructions

  1. 1

    Preheat the oven to 300 F

  2. 2

    Sift the flour and baking powder, then stir in the salt

  3. 3

    Beat the butter and sugar for 3 to 4 minutes until light and fluffy

  4. 4

    Add the eggs one at a time, scraping down the sides of the bowl between each addition

  5. 5

    Add the yogurt and vanilla extract to the batter

  6. 6

    Fold in the flour and mix well

  7. 7

    Grease a 9x9-inch square pan with butter and line with parchment

  8. 8

    Pour the batter into the pan

  9. 9

    Bake for about 40 minutes until golden brown and a skewer inserted in the center comes out clean

  10. 10

    Let cool for 5 minutes in the pan, then remove and cool completely on a wire rack before slicing

Tips

Tip 1

Room temperature ingredients cream together more easily and create a smoother batter for better texture

Tip 2

The low baking temperature prevents the edges from overcooking while the center sets properly

Tip 3

Don't overmix once flour is added to avoid a tough cake - fold just until combined

Good to Know

Storage

Cover and store at room temperature for up to 3 days or refrigerate for up to 1 week

Make Ahead

Can be made 1 day ahead - wrap tightly once completely cooled

Serve With

Serve at room temperature, plain or with powdered sugar, fresh berries, or your favorite frosting

See pairing guide →

Common Mistakes

Watch

Don't open the oven door during first 30 minutes to avoid collapse

Watch

Ensure butter is properly softened to avoid lumpy batter

Watch

Test doneness with a skewer - wet batter means it needs more time

Substitutions

Dairy-Free Swaps

unsalted butter
vegan butter1:1vegandairy-freedairy-free

Works well for plant-based version

Full guide →

Gluten-Free Swaps

all-purpose flour
almond flour1:1gluten-freegluten-free

Note: cake will be denser

Full guide →

General Alternatives

plain yogurt
sour cream1:1tangy

Adds similar moisture with slight tang

Full guide →
granulated sugar
coconut sugar1:1unrefined

Adds subtle caramel notes

Full guide →
Find more substitutions →

FAQ

Can I use Greek yogurt instead of plain yogurt?

Yes, but thin it with a tablespoon of milk as Greek yogurt is thicker and may make the cake denser than intended.

What if I don't have a 9x9 pan?

Use an 8-inch round pan but start checking for doneness at 35 minutes as it may bake faster in the different shape.

How long will this cake keep fresh?

Properly stored at room temperature, this cake stays moist for 3-4 days thanks to the yogurt. Refrigerate for longer storage.