Banana syrup for coffee brings a mellow, caramel-like banana flavor to iced lattes, cold brew, and homemade coffee drinks. This simple recipe uses just three ingredients and takes about 20 minutes, including cooling time. It is a sweet coffee syrup—not a protein supplement—but a little goes a long way when paired with milk or a protein-rich latte.
Why Make Banana Syrup for Coffee at Home?
Homemade banana syrup is a practical way to use a ripe banana and customize the sweetness of your morning drink. The flavor is especially good with espresso, cinnamon, vanilla, and cold brew. Unlike a banana smoothie, a strained syrup blends smoothly into coffee without adding pulp.
Ingredients (3 Simple Ingredients)
- 1 medium ripe banana: yellow with brown spots for a naturally fragrant flavor.
- ½ cup (100 g) granulated sugar: creates a pourable syrup and helps preserve the flavor.
- ½ cup (120 ml) water: extracts the banana flavor and dissolves the sugar.
Optional serving additions: a pinch of cinnamon, a drop of vanilla extract, espresso, ice, or milk. These are not required for the three-ingredient syrup itself.
How to Make Banana Syrup for Coffee
Step 1: Slice the banana
Peel and thinly slice the ripe banana. Thin slices release flavor quickly and are easy to strain later.
Step 2: Simmer the syrup
Add the banana slices, sugar, and water to a small saucepan. Bring to a gentle simmer over medium-low heat, stirring until the sugar dissolves. Simmer for 8–10 minutes, gently mashing a few banana slices with a spoon. Avoid a hard boil, which can make the syrup too thick.
Step 3: Steep and strain
Turn off the heat and let the mixture steep for 5 minutes. Pour it through a fine-mesh strainer into a heatproof container. Press gently to release liquid without forcing lots of pulp through. For a clearer coffee syrup, strain a second time through a fine filter.
Step 4: Cool and refrigerate
Let the syrup cool promptly, transfer to a clean sealed jar, and refrigerate. The syrup thickens slightly as it cools. If it becomes too thick to pour, stir in a teaspoon of water before using.
How to Use Banana Syrup in Coffee
For an iced banana latte, stir 1–2 teaspoons of cooled syrup into a double espresso, add ice, and top with ¾ cup milk of choice. For banana cold brew, mix 1–2 teaspoons with 8 ounces of cold brew and add milk if desired. For a hot latte, stir the syrup into fresh espresso before pouring in steamed milk. Start small, taste, and adjust: the syrup is concentrated and sweet.
Want a creamy topping for your banana iced coffee? Try our 5-minute protein cold foam, or learn three ways to make cold foam at home. Add the banana syrup to the coffee first, then spoon the foam on top.
Make It Work for a High-Protein Breakfast
The syrup itself is mostly added sugar and is not high in protein. To create a higher-protein coffee drink, combine a small amount with ultra-filtered dairy milk, fortified soy milk, or an appropriate ready-to-drink protein shake. Check the protein and sugar on your chosen product’s label. For another banana-flavored coffee idea, try our High-Protein Banana Bread Latte.
Flavor Variations
Caramelized banana syrup
Let the sugar turn pale golden in the pan before carefully adding the water and banana. Hot caramel can splatter, so add liquid slowly and keep hands clear.
Banana cinnamon coffee syrup
Steep a small cinnamon stick with the banana, then remove it when straining. This version pairs well with fall coffee drinks.
Banana vanilla latte syrup
After removing the pan from the heat, add a few drops of vanilla extract. Vanilla rounds out the banana flavor without adding another sweetener.
Storage and Food Safety
Because this homemade syrup contains fresh fruit and no tested commercial preservation process, keep it refrigerated in a clean, covered container. For best quality, use within 3–4 days; discard sooner if it develops off smells, bubbles, mold, or an unusual appearance. Do not store it at room temperature or assume it is shelf-stable. Freeze in small portions for longer storage and thaw in the refrigerator.
Common Mistakes to Avoid
- Using a green banana: the flavor will be less pronounced.
- Boiling too aggressively: the syrup may reduce into a sticky sauce.
- Skipping the strainer: banana pulp can make iced coffee cloudy and gritty.
- Adding too much syrup: start with one teaspoon, especially if your milk is already sweetened.
Nutrition Note
Nutrition depends on how much syrup you yield and how much you pour. The batch contains approximately 400 calories from the sugar alone, plus the banana. If the finished batch yields ¾ cup (12 tablespoons), each tablespoon contributes roughly 40–45 calories before accounting for any variation in yield. This is an estimate, not a laboratory analysis. Use a teaspoon or two when you want flavor without a very sweet drink.
Frequently Asked Questions
Can I make banana syrup without sugar?
You can simmer banana in water for a lightly flavored infusion, but it will not have the same sweetness, texture, or keeping quality as syrup. Refrigerate and use it promptly.
Does banana syrup taste like banana bread?
It has a ripe banana flavor. Cinnamon and vanilla can make it taste closer to banana bread.
Can I use frozen bananas?
Yes. Thaw them in the refrigerator first, then use the fruit and any released juices. The flavor and clarity may differ.
Is banana syrup good in cold brew?
Yes. Stir the syrup into a little coffee first, then add the rest of the cold brew and ice.
Can I use brown sugar instead of white sugar?
Yes. Brown sugar produces a darker, more molasses-like syrup and may slightly mask the banana flavor.
How long does homemade banana coffee syrup last?
Store it covered in the refrigerator and use within 3–4 days for best quality. Freeze portions if you want to keep it longer.
Is this banana syrup high in protein?
No. It is a sweet flavoring. Add it sparingly to a latte made with a protein-containing milk or shake.
Can I use banana syrup in matcha?
Yes. Start with one teaspoon in an iced matcha latte, then adjust to taste.
Bottom Line
This banana syrup recipe for coffee is an easy way to add homemade banana flavor to iced coffee, cold brew, and lattes. Make a small batch, keep it cold, and use a little at a time. For a no-syrup spiced option, try black coffee with fresh ginger. For more breakfast-friendly banana coffee inspiration, see our banana bread protein latte recipe.