Onion Latte With Espresso

Featured in: Sunrise Spoonfuls

Onion Latte is a daring, modern drink that combines sweet caramelized onions with robust espresso and creamy milk. The onion base is slowly caramelized with butter and sugar, blended until smooth, then incorporated into the freshly brewed espresso. Frothy milk tops off each cup, yielding a velvety texture and a subtle, savory depth. Optional honey or maple syrup adds gentle sweetness to balance the bold onion notes. This contemporary beverage is perfect for those seeking something uniquely savory in their coffee break and pairs excellently with sharp cheese pastries.

Updated on Wed, 05 Nov 2025 12:47:00 GMT
Savory Onion Latte topped with frothy milk, perfect for adventurous coffee lovers.  Save It
Savory Onion Latte topped with frothy milk, perfect for adventurous coffee lovers. | sunnyspoonful.com

A bold and unconventional latte that blends the subtle sweetness of caramelized onions with rich espresso and creamy milk. This avant-garde beverage offers a savory twist on the classic coffee drink, perfect for adventurous palates seeking new flavor frontiers.

The first time I tried combining onions with coffee, I was skeptical. But the result was shockingly smooth, with a complexity that made each sip a memorable experience.

Ingredients

  • Yellow onion: 1 small, thinly sliced
  • Unsalted butter: 1 tablespoon
  • Granulated sugar: 1/2 teaspoon
  • Salt: Pinch
  • Freshly brewed espresso: 2 shots (60 ml)
  • Whole milk: 300 ml (or oat milk for dairy-free option)
  • Honey or maple syrup: 1 teaspoon (optional, for sweetness)

Instructions

Prepare the onion base:
In a small skillet over medium-low heat, melt the butter. Add the sliced onion, sugar, and a pinch of salt. Cook slowly, stirring occasionally, until the onions are deeply caramelized and golden, about 12–15 minutes. Do not rush this step—low and slow yields the best flavor.
Blend the caramelized onions:
Transfer the caramelized onions and any pan juices to a blender. Add 2 tablespoons of milk and blend until completely smooth. Strain through a fine-mesh sieve to ensure a silky texture.
Make the latte:
Brew 2 shots of espresso and divide evenly between two cups. Add 1 tablespoon of the strained onion purée to each cup, stirring well to combine.
Froth the milk:
Heat the remaining milk until steaming, then froth using a milk frother or whisk until creamy and foamy.
Assemble:
Pour the frothed milk over the espresso-onion mixture in each cup. Sweeten with honey or maple syrup if desired. Gently stir and serve immediately.
Creamy blend of caramelized onions and rich espresso in this unique Onion Latte.  Save It
Creamy blend of caramelized onions and rich espresso in this unique Onion Latte. | sunnyspoonful.com

I introduced this latte at a brunch gathering and was surprised at how quickly it sparked curiosity. Even skeptical family members ended up finishing their cups and asking for the recipe.

Required Tools

Skillet, blender, fine-mesh sieve, espresso machine or strong coffee maker, milk frother or whisk

Allergen Information

Contains dairy (milk, butter). For dairy-free/vegan, use plant-based alternatives. No gluten, eggs, or nuts. Always check product labels for hidden allergens.

Nutritional Information (per serving)

Calories: 110. Total Fat: 4 g. Carbohydrates: 15 g. Protein: 4 g.

Experience bold flavors with a silky Onion Latte, ideal for breakfast or brunch. Save It
Experience bold flavors with a silky Onion Latte, ideal for breakfast or brunch. | sunnyspoonful.com

This latte is best enjoyed immediately while creamy and hot. Don&t be afraid to go outside the traditional coffee boundaries—the flavor is a unique adventure.

Recipe FAQs

Can I use plant-based ingredients?

Yes, substitute the butter and milk with your favorite plant-based alternatives for a dairy-free version.

Which onions work best for this drink?

Yellow onions are great, but feel free to experiment with sweet Vidalia or red onions for varied flavors.

How do I achieve silky onion purée?

Blend thoroughly with a bit of milk and strain through a fine-mesh sieve to remove all solids for a smooth finish.

Is espresso essential or can I substitute?

Espresso delivers bold coffee notes, but strong freshly brewed coffee can work as a substitute.

What are tasty garnishes for serving?

A sprinkle of black pepper or fresh chive elevates the savory profile and presentation of this beverage.

Onion Latte With Espresso

Caramelized onions meet espresso, blending savory and sweet in a creamy latte for daring flavor lovers.

Prep Time
10 mins
Cook Time
15 mins
Total Duration
25 mins
Authored by Lana Bright

Recipe Type Sunrise Spoonfuls

Skill Level Medium

Cuisine Style Contemporary / Experimental

Recipe Yield 2 Serving Size

Diet Preferences Vegetarian-Friendly, Free From Gluten

What You'll Need

Onion Base

01 1 small yellow onion, thinly sliced
02 1 tablespoon unsalted butter
03 1/2 teaspoon granulated sugar
04 Pinch of salt

Latte Components

01 2 shots (2 fluid ounces) freshly brewed espresso
02 10 fluid ounces whole milk or oat milk
03 1 teaspoon honey or maple syrup, optional

Directions

Step 01

Caramelize the Onion: In a small skillet over medium-low heat, melt the butter. Add the sliced onion, granulated sugar, and a pinch of salt. Stir occasionally and cook until the onions are deeply golden and caramelized, about 12 to 15 minutes.

Step 02

Blend and Strain Onion Purée: Transfer the caramelized onions with pan juices to a blender. Add 2 tablespoons of milk and process until fully smooth. Pass the mixture through a fine-mesh sieve to achieve a silky purée.

Step 03

Prepare Espresso Base: Brew 2 shots (2 fluid ounces) of espresso and divide between two serving cups. Add 1 tablespoon of onion purée to each cup, stirring thoroughly to integrate.

Step 04

Froth and Heat Milk: Heat the remaining milk until steaming but not boiling. Froth using a milk frother or whisk until creamy and foamy.

Step 05

Finish and Serve: Pour frothed milk over the espresso-onion mixture in both cups. Optionally sweeten with honey or maple syrup. Stir gently and serve immediately while hot.

Tools You'll Need

  • Skillet
  • Blender
  • Fine-mesh sieve
  • Espresso machine or strong coffee maker
  • Milk frother or whisk

Allergy Information

Review each ingredient to identify potential allergens, and consult a healthcare professional if you're unsure.
  • Contains dairy from milk and butter unless plant-based alternatives are used.
  • Free from gluten, eggs, and nuts. Always review specific product labels for hidden allergens.

Nutrition Details (Per Serving)

This nutritional data is for reference only and isn't a substitute for medical advice.
  • Caloric Value: 110
  • Fats: 4 grams
  • Carbohydrates: 15 grams
  • Proteins: 4 grams