Classic Lemon Poppy Seed Cake with Buttermilk Glaze

Joshua Walker
Joshua Walker
Published: April 8, 2026
Tags: Dessert, Baking, Lemon, Brunch, Cake

Poppy Cake

Moist lemon cake studded with poppy seeds, finished with a tangy buttermilk glaze.

Prep Time:20 minCook Time:50 minTotal Time:80 minServings:12Difficulty:Medium

This lemon poppy seed cake is one of my happiest baking projects — bright lemon, tiny crunchy poppy seeds, and a tender crumb that keeps you coming back for another slice. I love how the buttermilk keeps the cake moist and the glaze adds a tangy finish that balances the sweetness.

It’s a perfect cake for brunch, tea, or a simple dessert to share with friends. The recipe is approachable: one bowl for dry ingredients, another for wet, and a quick fold-in of the seeds. Enjoy the aroma while it bakes — it’s part of the pleasure.

Nutrition (per serving)

Calories:380 kcal
Protein:5 g
Carbs:50 g
Fat:16 g

Directions

  1. 1
    Greasing and flouring a bundt pan for lemon poppy seed cake.

    Preheat the oven to 350°F. Grease and flour a 10- to 12-cup bundt pan, tapping out excess flour.

  2. 2
    Whisking flour, sugar, leaveners, salt, and poppy seeds in a mixing bowl.

    In a large bowl whisk together flour, sugar, baking powder, baking soda, salt, and poppy seeds until evenly combined.

  3. 3
    Whisking the wet lemon cake ingredients with buttermilk and lemon zest.

    In another bowl whisk melted butter, vegetable oil, eggs, buttermilk, lemon zest, lemon juice, and vanilla until smooth.

  4. 4
    Gently folding lemon poppy seed batter until just combined with a few flour streaks.

    Pour the wet ingredients into the dry and stir gently just until combined — don’t overmix. A few small streaks of flour are fine.

  5. 5
    Smoothing lemon poppy seed batter in a prepared bundt pan before baking.

    Transfer the batter to the prepared bundt pan and smooth the top. Bake until golden and a toothpick inserted in the center comes out with a few moist crumbs, 45–55 minutes.

  6. 6
    Golden lemon poppy seed bundt cake cooling on a wire rack.

    Let the cake cool in the pan 10 minutes, then invert onto a wire rack and cool completely, about 45 minutes more.

  7. 7
    Whisking powdered sugar, buttermilk, and lemon juice into a pourable glaze.

    Make the glaze by whisking powdered sugar with 2 tbsp buttermilk and a little lemon juice; add the extra tablespoon of buttermilk if needed to reach a pourable consistency.

  8. 8
    Drizzling buttermilk glaze over a cooled lemon poppy seed bundt cake.

    When the cake is cool, drizzle the glaze over the top, letting it run down the sides. Let the glaze set for 15–20 minutes before slicing and serving.

Ingredients

  • All-purpose flour:3 cups
  • Granulated sugar:1 1/2 cups
  • Baking powder:2 tsp
  • Baking soda:1/2 tsp
  • Salt:1 tsp
  • Poppy seeds:3 tbsp
  • Unsalted butter, melted:1/2 cup
  • Vegetable oil:1/2 cup
  • Large eggs:3 pieces
  • Buttermilk:1 cup
  • Lemon zest (about 2 lemons):2 tbsp
  • Fresh lemon juice:1/4 cup
  • Vanilla extract:2 tsp
  • Powdered sugar (for glaze):1 1/2 cups
  • Buttermilk (for glaze):2-3 tbsp

Tips & Notes

  • If you don’t have buttermilk, make a quick substitute by adding 1 tbsp lemon juice to 1 cup milk and letting it sit 5 minutes.
  • Zest the lemons before juicing them — zest adds bright aroma and extra lemon flavor to the cake.
  • Check doneness starting at 45 minutes; ovens vary. Avoid opening the oven too early to keep the cake from collapsing.