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Citrusy, moist, and oh so fluffy vegan lemon poppy seed cake with sweet vanilla icing or glaze! It’s a fuss-free, one-bowl snack cake that always brings a little sunshine to the dessert table.

overhead view of a sliced lemon poppy seed cake.
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Bright and Zingy Vegan Lemon Poppy Seed Snack Cake

Vegan lemon desserts are some of our favorites during spring and summer. In our vegan lemon cupcakes, the fresh lemon flavor pops in your mouth and instantly makes you feel refreshed! This vegan lemon poppy cake recipe is no different, but is a little more simple to put together and is great for sharing with your family and friends.

The lemon poppy seed cake is easy to make in one bowl with simple vegan baking staples. Fresh lemon juice and zest fill it with a bright citrus flavor that lemon lovers will adore, while poppy seeds add gorgeous black specks throughout and a delightful crunch. Pour the foolproof batter into your cake tin and let it bake to perfection!

The best part comes when it’s out of the oven and cooled down—the frosting! Choose the frosting you love, whether it’s homemade vegan vanilla buttercream, a zesty lemon glaze, or an accidentally vegan store-bought frosting. You can have a lot of fun decorating this easy lemon and poppy seed cake any way you like.

Whether it’s Easter, Mother’s Day, a backyard barbecue, or a birthday party, everyone will smile when you hand them a slice of this easy lemon cake. Don’t fret if you end up with leftovers—they stay fresh in the fridge or freezer for weeks! 

Looking for more vegan lemon desserts? Check out our vegan lemon shortbread cookies, vegan lemon loaf cake, and creamy lemon ice pops!

The Ingredients and Substitutes

ingredients for lemon poppy seed cake with labels.
  • Sugar: Regular granulated white sugar is best.
  • Oil: Any neutral-tasting oil will do, like vegetable oil or canola oil. Coconut oil works, too.
  • Lemon juice and zest: Squeeze the lemons yourself to give the cake a more vibrant punch of citrusy goodness! Feel free to use extra lemon juice or zest if you prefer a particularly tangy cake.
  • Applesauce: Make sure the applesauce is unsweetened so your cake isn’t too sweet.
  • Vanilla extract: For a delicate flavor.
  • Water: The water thins the batter slightly.
  • Flour: Use all-purpose flour to give the cake a light and fluffy crumb. 
  • Baking soda: To add lift to the vegan lemon cake.
  • Salt: It balances the flavors in the cake.
  • Poppy seeds: Lemon and poppy seeds are a classic duo. The lemon is refreshing and tangy, while the poppy seeds are a little crunchy.
  • Vegan frosting: You can use any vegan vanilla frosting or lemon-infused frosting you like, such as vanilla buttercream, a vanilla or lemon glaze, vegan cream cheese frosting, or a vegan lemon buttercream for more tang.

What to Add to Lemon Poppy Seed Cake

  • Nuts and seeds: Add a little more crunch to the cake by folding in ½ cup of sunflower seeds, chopped walnuts, pumpkin seeds, or chopped almonds.
  • Fresh berries: Blueberries would be perfect in this cake, just as they are in our lemon blueberry cookies and lemon blueberry scones. You could also add raspberries or diced strawberries. We recommend only adding ½ cup of berries to the batter.
  • Zucchini: Sneak some veggies into this cake with 1 cup of shredded zucchini (not drained of its excess water). Remember to omit 1 cup of water from this recipe if you add the zucchini since it naturally contains water already. Check out these 14 Delicious Zucchini Recipes if you’re a zucchini lover!
  • Earl Grey tea: Simply add the leaves from two tea bags into the cake batter, and voila! You could also use regular black tea, but I find that lemon Earl Grey cake tastes the best.
  • ​​Turmeric: Make the cake more yellow with a pinch of turmeric powder in the batter (you won’t taste it).
  • Lavender: Add 1 to 2 teaspoons of dried, food-grade lavender to the cake batter for a delicate floral flavor.
  • Vegan chocolate chips: It’s not traditional, but ½ cup of your favorite dairy-free dark, milk, or white chocolate chips/chunks in the cake will add a nice, chocolatey twist. Alternatively, swap out the vanilla frosting for a melted vegan chocolate drizzle.
  • Decorations: The iced vegan lemon cake wouldn’t be complete without a sprinkle of lemon zest and extra poppy seeds on top!

How To Make Vegan Lemon Poppy Seed Cake

  • Whisk the sugar, oil, lemon juice, lemon zest, applesauce, and vanilla extract together in a large bowl until combined and then stir in the water.
wet ingredients for lemon poppy seed cake in a large white bowl.
pouring water into a wet cake batter mixture in a large white bowl.
  • Gently stir in the flour, baking soda, and salt until just combined.

A few small lumps in the batter are okay! It means you haven’t overmixed the cake batter.

pouring flour into a wet cake batter mixture in a large white bowl.
  • Gently fold the poppy seeds into the smooth batter.
pouring poppy seeds into white cake batter in a large white bowl.
  • Pour the cake batter into the prepared sheet pan. Then bake the lemon poppy seed cake until the edges are golden or a toothpick inserted in the middle comes out clean.
unbaked lemon poppy seed cake batter in a rectangular baking pan.
a baked rectangular lemon poppy seed cake.

Is the cake not quite done, even after the 35 minutes? Continue baking in 5-minute intervals until it’s done.

  • Set the cake aside to cool completely.
  • Frost and decorate the cake, then slice and enjoy!
baked lemon poppy seed cake decorated with vanilla glaze, lemon zest, and poppy seeds.

Enjoy each slice of vegan lemon and poppy seed cake with vegan yogurt or vegan whipped cream and berries, or scoops of vegan vanilla ice cream!

FAQs

How do I make a less-sweet cake?

While it hasn’t been tested, you can try reducing the granulated sugar to ¾ cup or replace it with a granulated sugar alternative, like monk fruit sweetener or erythritol. You can also omit the frosting or glaze from the cake.

Can it be made gluten-free?

To make a gluten-free lemon poppy seed cake, replace the flour with an all-purpose gluten-free flour blend, like King Arthur’s or Bob’s Red Mill.

I don’t have a 9×13-inch cake pan. Can I use a different pan?

Yes, you can split the batter into two round 8-inch cake pans, a large bundt pan, or two 9-inch loaf pans.

Pro Recipe Tips

  • Measure the flour accurately: To avoid adding too much flour and ending up with a dense cake, spoon the flour into the measuring cup and level off the excess on top with the back of a knife. DO NOT scoop the cup into the bag of flour.
  • Don’t overmix the cake batter: Use a silicone spatula to gently stir the dry ingredients into the wet mixture until the dry mix is just incorporated. A few lumps left behind are okay!
  • Use room temperature ingredients: Place all of the wet ingredients on the kitchen counter for at least 30 minutes before baking so they have time to come down to room temperature.
  • Let it cool: The cake needs to be completely cool before you slice it or add the frosting!
two slices of lemon poppy seed cake cut from the larger cake.

Storage Instructions

Once fully cooled, store the lemon poppy seed sheet cake in an airtight container at room temperature for 2 to 3 days or in the refrigerator for 5 to 7 days.

You can also freeze the whole cake or individual slices (unfrosted). Keep them in an airtight container or wrapped in plastic wrap and freeze for up to 3 months. Let the leftover cake thaw on the counter for several hours or in the fridge overnight.

slices of lemon poppy seed cake on top of each other on a white plate.

More Vegan Cake Recipes

You’ll also love these 35 Must-Try Vegan Cake Recipes!

Photos by Alfonso Revilla

Lemon Poppy Seed Cake

4.93 from 28 votes
Prep: 10 minutes
Cook: 35 minutes
Total: 45 minutes
Servings: 16 servings
Citrusy, moist, and oh so fluffy vegan lemon poppy seed cake with sweet vanilla icing or glaze! It’s a fuss-free, one-bowl snack cake that always brings a little sunshine to the dessert table.

Ingredients 

  • 1 ¼ cups of granulated sugar
  • ½ cup of vegetable oil
  • Juice and zest of 2 small lemons
  • ¼ cup of unsweetened applesauce
  • 2 teaspoons of vanilla extract
  • 2 cups of water
  • 3 cups of all-purpose flour
  • 2 teaspoons of baking soda
  • 1 teaspoon of salt
  • cup of poppy seeds
  • Storebought or homemade vanilla frosting

Instructions 

  • Preheat the oven to 350 degrees F. Lightly grease a 9×13-inch pan.
  • In a large mixing bowl, whisk together the sugar, oil, lemon juice, lemon zest, applesauce, and vanilla extract until well-combined. Add water and mix thoroughly.
  • Add the flour, baking soda, and salt, and stir until just combined. (Your batter may have a few small lumps and that's okay. You don't want to overmix.)
  • Fold in the poppy seeds.
  • Pour the batter into the pan. Bake for 35 minutes or until the edges are golden and begin to pull away from the pan. Take a toothpick, insert it into the middle of the cake and make sure it comes out clean. If it doesn’t, bake in 5 minute increments until it does.
  • Allow the cake to cool completely before frosting.

Notes

  • Measure the flour accurately: To avoid adding too much flour and ending up with a dense cake, spoon the flour into the measuring cup and level off the excess on top with the back of a knife. DO NOT scoop the cup into the bag of flour.
  • Don’t overmix the cake batter: Use a silicone spatula to gently stir the dry ingredients into the wet mixture until the dry mix is just incorporated. A few lumps left behind are okay!
  • Use room temperature ingredients: Place all of the wet ingredients on the kitchen counter for at least 30 minutes before baking so they have time to come down to room temperature.

Nutrition

Calories: 220kcalCarbohydrates: 35gProtein: 3gFat: 8gSaturated Fat: 1gPolyunsaturated Fat: 5gMonounsaturated Fat: 2gTrans Fat: 0.05gSodium: 285mgPotassium: 48mgFiber: 1gSugar: 16gVitamin A: 1IUVitamin C: 2mgCalcium: 35mgIron: 1mg

Disclaimer: Although plantbasedonabudget.com attempts to provide accurate nutritional information, kindly note that these are only estimates. Nutritional information may be affected based on the product type, the brand that was purchased, and in other unforeseeable ways. Plantbasedonabudget.com will not be held liable for any loss or damage resulting for your reliance on nutritional information. If you need to follow a specific caloric regimen, please consult your doctor first.

Additional Info

Author: Honor
Course: Dessert
Cuisine: American
Method: Oven
Diet: Vegan
Tried this recipe?Please tag us at @PlantBasedOnABudget! 🙂
About

Honor

Loves baking, gardening and preparing delicious, compassionate meals for her vegan family of four.

More about Honor

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