How to Make Café Bon Bon
Café Bon Bon uses a 1:1 ratio of espresso to condensed milk. Pour the condensed milk into a clear glass first, then gently add the espresso on top so the two layers remain visually distinct. Do not combine them before serving.
Café Bon Bon is a dessert-style espresso drink built on a 1:1 ratio of espresso to condensed milk, served in a clear glass so the visual contrast between dark espresso and white condensed milk becomes part of the experience. The two layers are left unmixed before serving.
Ratio
1:1 espresso to condensed milk
What you need
- espresso machine
- clear glass
- small measuring vessel
Method
Measure out your condensed milk and pour it into a clear glass
The volume of condensed milk should equal the volume of espresso you intend to pull, to maintain the 1:1 ratio
Expert tipA clear glass is essential — the stark contrast between the white condensed milk and dark espresso on top is a defining visual element of this drink
Pull your espresso shot
Pull into a separate vessel so you can control how you pour it onto the condensed milk
Expert tipCondensed milk is intensely sweet, so the espresso needs to be well-extracted and strong enough to hold its own — a weak or sour shot will be overwhelmed
Slowly pour the espresso on top of the condensed milk, disturbing the layers as little as possible
The espresso will float over the denser condensed milk if poured gently
Expert tipPouring over the back of a spoon slows the flow and reduces turbulence, helping the layers stay separate
Serve immediately without stirring, presenting the drink with the layers still intact
The drinker may stir at the table or sip through the layers — both are acceptable, but the layered presentation should be preserved for serving
Watch it done
The source videos we studied to build this method.
▸ Trimmed to the recipe steps (5:06–5:46)
Covers five lesser-known espresso-based drinks including cortado, maruchino, cortadito, flat white, and café bon bon, with step-by-step at-home preparation for each
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Why this works
Condensed milk is significantly denser than espresso, so the two liquids stratify naturally when the espresso is poured with care. The 1:1 ratio keeps sweetness and coffee strength in equilibrium so neither dominates. Serving the layers unmixed lets the drinker experience the full character of each component before they combine, which is part of what makes this drink distinct from simply sweetening a coffee.
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Where beginners go wrong
- 1
Layers collapse during pouring
Pour the espresso as slowly as possible and as close to the surface as you can, or use the back of a spoon to disperse the flow and reduce turbulence
- 2
Drink is unpleasantly sweet or the coffee is lost
The 1:1 ratio assumes a strong, well-extracted espresso — if the balance feels off, pull a longer or more concentrated shot rather than reducing the condensed milk
- 3
The contrast between layers is not visible
Switch to a clear glass; the layered visual is central to the drink and cannot be appreciated in an opaque cup
- 4
Espresso is too weak to balance the condensed milk
Use a ristretto-style pull or reduce the condensed milk slightly — the espresso must be the dominant flavor driver, not the sweetener
What you should taste
Bold espresso bitterness set against the thick, caramel-like sweetness of condensed milk. The intensity of each element sharpens in the first sips and softens as the layers gradually blend together.
FAQ
Is Café Bon Bon the same as Vietnamese iced coffee?
Both use condensed milk, but Café Bon Bon uses espresso rather than filter coffee. The creator notes that espresso is considerably more complex and interesting than the drip-style coffee common in Vietnamese preparations, which produces a different flavor profile even with the same sweetener.
Should the condensed milk and espresso be stirred before drinking?
The creator recommends not combining the layers before serving. You can stir at the table or drink through them — but keeping them separate is the intended presentation.
Why must it be served in a clear glass?
The visual contrast between the white condensed milk and the dark espresso on top is a defining characteristic of the drink. A clear glass makes that contrast visible and is part of how the drink is traditionally presented.
Method adapted from @homecafecharlie's video.
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