Seltzer Cake

Featured in Sweet Treats from My Kitchen.

Classic seltzer cake with sparkling water batter. 25 minutes preparation, 30 minutes baking time. Makes 24 pieces.
Rehan Magic House Recipes
Updated on Sat, 05 Apr 2025 00:17:04 GMT
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A classic sheet cake that becomes particularly airy and moist through the addition of carbonated water. The fine carbon dioxide bubbles provide a light texture, while the lemon glaze with colorful sprinkles makes the cake the perfect companion for children's birthdays or coffee gatherings.

Our Basic Ingredients

  • Wheat flour: Base of the dough
  • Eggs: For binding and lightness
  • Sunflower oil: Makes the dough smooth
  • Carbonated water: For the characteristic lightness
  • Lemon glaze: With powdered sugar for a refreshing note
  • Colorful sprinkles: For visual appeal
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The Perfect Dough

Preparation:
  • Beat eggs with sugar and oil until foamy
  • Carefully fold in flour-baking powder mixture
  • Briefly stir in carbonated water
  • Distribute dough evenly in the baking sheet

Storage

  • Store in airtight container at room temperature
  • Glaze protects against drying out
  • Freeze in portions (after glaze has dried)
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Creative Variations

  • Chocolate glaze instead of lemon glaze
  • Buttercream decoration for festive occasions
  • Chopped nuts or raisins in the dough

This seltzer cake is a timeless classic of German baking. Its simple preparation and reliably good taste make it the perfect companion for any occasion.

Frequently Asked Questions

→ What does the sparkling water do in the cake?
The carbonation makes the batter especially light and airy. The cake becomes fluffier as a result.
→ Can I use still water instead?
No, the carbonation is important for the texture. Only use sparkling water with carbonation.
→ How long does the cake keep?
In an airtight container at room temperature for 3-4 days. The glaze helps prevent it from drying out.
→ Can I bake the cake without the glaze?
Yes, but the lemon glaze adds extra flavor and prevents the cake from drying out.
→ Is the baking time shorter with convection heat?
At 160°C convection, the baking time remains the same. Use a toothpick test to check doneness.

Moist Seltzer Sheet Cake

Simple sheet cake with sparkling water for extra fluffiness. Decorated with sugar glaze and colorful sprinkles.

Prep Time
25 Minutes
Cook Time
30 Minutes
Total Time
55 Minutes
By: Reham

Category: Desserts & Sweets

Difficulty: Easy

Cuisine: German

Yield: 24 Servings (24 squares)

Dietary: Vegetarian, Dairy-Free

Ingredients

→ For the cake batter

01 4 medium eggs, at room temperature
02 250g granulated sugar
03 1 packet vanilla sugar (or 1 teaspoon vanilla extract)
04 150ml sunflower oil
05 1 packet baking powder (about 15g or 1 tablespoon)
06 350g all-purpose flour
07 175ml sparkling mineral water
08 Butter for greasing the pan

→ For the glaze and decoration

09 250g powdered sugar, sifted
10 4 tablespoons fresh lemon juice (or water)
11 2-3 tablespoons colorful sprinkles

Instructions

Step 01

In a large mixing bowl, whisk together the eggs, granulated sugar, vanilla sugar, and oil until well combined. In a separate bowl, mix the baking powder with the flour, then gradually add to the wet ingredients, stirring until just combined. Finally, gently stir in the sparkling mineral water - the batter will be somewhat thin, which is normal.

Step 02

Preheat your oven to 350°F (180°C) or 320°F (160°C) for convection ovens. Generously grease a rectangular baking sheet (approximately 15×10 inches/39×26cm) with butter. Pour the batter into the prepared pan, smoothing the top with a spatula. Bake for 25-30 minutes until golden and a toothpick inserted in the center comes out clean. Allow to cool completely in the pan.

Step 03

Once the cake is completely cool, prepare the glaze by whisking together the sifted powdered sugar and lemon juice until smooth and pourable. Spread the glaze evenly over the cake and immediately sprinkle with colorful sprinkles before the glaze sets. Let the glaze harden completely before cutting into approximately 24 squares.

Notes

  1. The sparkling mineral water adds extra lightness and fluffiness to this simple sheet cake - it's the secret ingredient!
  2. This recipe yields approximately 24 pieces, making it perfect for birthday parties, bake sales, or any gathering.

Tools You'll Need

  • Rectangular baking sheet (approximately 15×10 inches/39×26cm)
  • Mixing bowl
  • Electric hand mixer

Allergy Information

Please check ingredients for potential allergens and consult a health professional if in doubt.
  • Contains gluten (wheat flour)
  • Contains eggs

Nutrition Facts (Per Serving)

It is important to consider this information as approximate and not to use it as definitive health advice.
  • Calories: 220
  • Total Fat: 8 g
  • Total Carbohydrate: 35 g
  • Protein: 3 g