Air Fryer Cake Recipes: Thai Coconut-lemongrass Sponge That Wows

A fragrant, fluffy sponge with coconut richness and lemongrass snap, baked fast in your air fryer for weeknights or guests.

You want a cake that tastes like you planned your life, not like you panic-googled “dessert” at 9:17 p.m.

This Thai-inspired coconut-lemongrass sponge hits that sweet spot: light, springy, and quietly expensive-tasting.

It smells like a tropical spa and eats like a cloud, but it cooks in an air fryer like it’s late for a meeting.

Serve it plain and people will still ask for the recipe. Add a coconut glaze and they’ll assume you have “a thing” for baking.

Best part? No fussy layers, no water baths, no drama. Just smart flavors and a simple method that works.

The Secret Behind This Recipe

The secret is infusing the coconut milk with lemongrass before it ever touches the batter. You get bright citrusy perfume without chunks of fibrous stalk ruining the crumb.

The second trick: gentle mixing. Sponge cakes don’t lose because the ingredients are “wrong.” They lose because we beat the life out of the batter and then act surprised.

Finally, the air fryer advantage: steady convection heat sets the edges quickly while the center stays tender. Translation: you get bakery-style bounce without babysitting the oven.

Ingredients Breakdown

Use room-temperature ingredients whenever you can. Cold eggs and cold coconut milk make the batter thicker, which makes the cake heavier, which makes you sad.

• Eggs (3 large): Structure and lift for that airy sponge.
• Granulated sugar (90 g, about 1/2 cup minus 1 tablespoon): Sweetness and stability for the foam.
• All-purpose flour (90 g, about 3/4 cup): The base; keep it light by measuring carefully.
• Baking powder (1 teaspoon): A small boost to help the sponge rise evenly in an air fryer.
• Salt (1/4 teaspoon): Makes coconut taste more like coconut.
• Full-fat coconut milk (120 ml, 1/2 cup): Moisture and richness; don’t use “light” unless you enjoy dry cake.
• Lemongrass (1 large stalk): Fragrance and bright citrus flavor.
• Neutral oil (2 tablespoons): Keeps the crumb soft even after chilling.
• Vanilla extract (1 teaspoon): Rounds out the flavor so lemongrass doesn’t feel sharp.
• Lime zest (1 teaspoon, optional): Extra zing; skip if you want pure lemongrass-coconut.
• Toasted coconut flakes (2 to 3 tablespoons, optional): For topping and crunch.

Optional quick glaze (highly recommended if you like drama in a good way): powdered sugar, a splash of coconut milk, and a pinch of salt.

Step-by-Step Instructions

This is written for a small cake that fits most basket-style air fryers. Use a 6-inch round pan or a similarly sized cake tin that fits with airflow around it.

1. Prep your pan. Grease a 6-inch round cake pan, line the bottom with parchment, then lightly grease the parchment. This cake wants to rise, not cling.

2. Bruise the lemongrass. Peel off the dry outer layer, then smash the stalk with the side of a knife. Chop into 2-inch pieces to expose more surface area.

3. Infuse the coconut milk. Warm coconut milk with lemongrass in a small saucepan until steaming, not boiling. Turn off heat, cover, and steep 10 minutes.

4. Strain and cool. Strain out lemongrass and let the coconut milk cool to lukewarm. Hot liquid + eggs equals scrambled regrets, FYI.

5. Preheat the air fryer. Preheat to 320°F (160°C) for 3 to 5 minutes. If your air fryer runs hot, use 310°F (155°C).

6. Sift dry ingredients. Sift flour, baking powder, and salt together. Sifting isn’t a personality trait, but it does help the crumb stay airy.

7. Whip eggs and sugar. Beat eggs and sugar until pale, thick, and ribboning, about 4 to 6 minutes with a hand mixer. You want volume you can see.

8. Add flavor. Beat in vanilla and optional lime zest briefly, just to combine.

9. Fold in dry mix. Add sifted dry ingredients in two additions, folding gently with a spatula. Stop the second you don’t see dry streaks.

10. Temper the coconut milk. Mix oil into the infused coconut milk. Spoon a little batter into the coconut mixture, stir, then pour it back into the main batter and fold gently.

11. Fill the pan. Pour batter into the pan and tap once on the counter to pop large air bubbles. Don’t get carried away; you’re not trying to deflate it.

12. Air fry. Bake at 320°F (160°C) for 18 to 24 minutes. Start checking at 18 minutes. It’s done when the top springs back and a skewer comes out clean or with a few moist crumbs.

13. Cool properly. Cool in the pan 10 minutes, then turn out onto a rack and cool completely. If you glaze while warm, it melts and disappears like your willpower.

14. Finish. Top with toasted coconut flakes, or drizzle a quick coconut glaze. Slice, serve, and act casual when people compliment you.

Preservation Guide

This sponge stays tender, but it still follows the laws of cake physics. Heat and air make it stale; a little protection keeps it dreamy.

• Room temperature: Store in an airtight container up to 2 days. Keep it away from sunlight and heat sources.
• Refrigerator: Store up to 5 days, tightly covered. Let slices sit 15 minutes at room temp before eating for the softest texture.
• Freezer: Wrap slices in plastic wrap, then foil, and freeze up to 2 months. Thaw overnight in the fridge or 1 to 2 hours at room temp.
• Refresh tip: Warm a slice 8 to 12 seconds in the microwave to bring back that fresh-baked softness.

If you glazed the cake, store it in a container with a little headroom so the top doesn’t stick. Nobody wants a lid-flavored dessert.

Health Benefits

This is still cake, not a multivitamin, but it does bring some upsides. It uses fragrant aromatics and satisfying fats, which can help you feel “done” after one slice instead of three.

• Lemongrass aroma: Bright, citrusy scent that can feel refreshing after heavier meals.
• Coconut milk: Adds richness and satiety so the cake feels indulgent with a lighter crumb.
• Portion-friendly: A 6-inch cake makes smaller slices that feel intentional, not accidental.
• Lower bake time: Air frying often means less time heating the kitchen, which is a health benefit for your mood, IMO.

If you want a lighter version, you can reduce sugar slightly, but don’t get greedy. Sugar stabilizes the eggs and helps the sponge rise.

Pitfalls to Watch Out For

This cake is easy, but it’s not psychic. If you skip the key steps, it will tell on you in the texture.

• Overheating the coconut milk: Boiling can split it and dull the lemongrass aroma. Warm and steep, don’t cook it to death.
• Pouring hot liquid into eggs: You’ll get eggy lumps and a dense crumb. Cool to lukewarm before tempering.
• Overmixing after flour: This knocks out air and toughens the sponge. Fold gently and stop early.
• Wrong pan size: Too large makes it thin and dry; too small can overflow. Stick to a 6-inch round or equivalent volume.
• Air fryer hot spots: Some units brown aggressively on top. If you see fast browning, loosely tent with foil halfway through.

Also, don’t keep opening the basket to “check.” Every peek dumps heat and slows the rise. Trust the timer, then verify near the end.

Recipe Variations

You can keep the coconut-lemongrass soul and still switch the vibe. These options stay air-fryer friendly and don’t require new equipment.

• Pandan twist: Add 1/2 teaspoon pandan extract and skip the lime zest. You’ll get a sweet, nutty, vanilla-grass vibe.
• Ginger-lime version: Add 1 teaspoon finely grated ginger to the infused coconut milk and keep the lime zest for extra punch.
• Thai tea glaze: Drizzle a simple glaze flavored with strong brewed Thai tea. The caramel notes play nicely with coconut.
• Mini cupcakes: Use silicone cups and air fry at 310°F (155°C) for about 10 to 13 minutes. Great for sharing, dangerous for self-control.
• Gluten-free swap: Use a 1:1 gluten-free baking flour blend and sift well. Expect a slightly more delicate crumb.

If you want to add shredded coconut into the batter, keep it small: 2 tablespoons max. More than that can weigh the sponge down.

FAQ

What pan works best for air fryer sponge cake?

A 6-inch round metal cake pan works best because it conducts heat evenly and fits most baskets. Leave space around the pan so air can circulate.

Can I use lemongrass paste instead of a fresh stalk?

Yes, but go light: start with 1/2 teaspoon stirred into the coconut milk after warming, then taste the aroma. Paste can taste sharper and less floral than fresh.

Why did my cake sink in the middle?

Usually the center stayed underbaked or the foam collapsed from overmixing. Check your air fryer temperature, avoid opening the basket early, and fold gently after adding flour.

How do I know when the sponge is done without drying it out?

Look for a springy top and edges that pull slightly from the pan. A skewer should come out clean or with a few moist crumbs, not wet batter.

Can I make this dairy-free?

It already is, as long as you use coconut milk and a neutral oil. Just confirm your sugar and flavor extracts match your dietary needs.

What’s the best topping for this cake?

Toasted coconut flakes keep it simple and elegant, while a coconut glaze makes it feel bakery-fancy. Fresh mango on the side also makes you look like you know things.

Final Thoughts

This Thai coconut-lemongrass sponge proves you don’t need an oven, a mixer the size of a suitcase, or a full Sunday to make a dessert people remember.

It’s light but flavorful, quick but not lazy, and it makes your kitchen smell like you booked a vacation without telling anyone.

Make it once to satisfy the craving, then make it again because someone will “just want a small slice” and somehow finish half the cake.

If you try one upgrade, do the infused coconut milk. That’s the whole cheat code, and it’s almost unfair.