- Why did the milk curdle?
- The orange juice was too acidic, or the milk too hot. Use less juice, or mix it with the coffee first, never directly into the milk.
- What milk should I use?
- High protein milk (e.g. cow's milk or barista plant milk), because these form stable microfoam.
Orange & vanilla latte
Pairing coffee and citrus requires delicate balance. The acidity of orange juice (citric acid) can easily curdle milk proteins (casein coagulation), giving the drink a 'lumpy' texture. The essence of the technique is buffering: coffee and honey dilute and 'tame' the acid before it meets the milk, maintaining a creamy emulsion.
Ingredients
50
ml
Espresso (fresh, dark roast)
200
ml
Whole milk (3.5% or barista plant milk)
30
ml
Strained orange juice (pulp-free)
1
tsp
Vanilla extract
1
tbsp
Honey
1
pinch
Grated orange zest (organic, untreated)
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Equipment Needed
- Espresso machine or Moka pot
- Milk frother (steam wand or manual)
- Tall glass (for layer visuals)
Allergen Information
Milk
Instructions
1
✓
Brew the coffee, and whilst hot stir in the honey, vanilla and orange juice.
Tip: This is the 'base' mix. The sugar content of honey and the buffer balance of coffee help stabilise the orange acidity.
2
✓
Heat the milk to 60-65°C and froth until creamy.
Tip: Do not overheat! Above 70°C the milk loses its sweet taste and tastes 'cooked', and foam structure becomes unstable.
3
✓
Pour the frothed milk into the glass.
Tip: Let stand for half a minute so milk and foam separate: hot milk at bottom, stiffer foam on top.
4
✓
Slowly, in a thin stream, pour the coffee mixture into the centre of the milk.
Tip: Due to density difference, the coffee settles under the foam but above the milk, creating a beautiful three-layer (Latte Macchiato) effect.
5
✓
Sprinkle the top with grated orange zest.
Tip: The essential oils in the zest reach your nose before the first sip, establishing the flavour experience.
Recipe FAQ
Ingredients
- 50 ml Espresso (fresh, dark roast)
- 200 ml Whole milk (3.5% or barista plant milk)
- 30 ml Strained orange juice (pulp-free)
- 1 tsp Vanilla extract
- 1 tbsp Honey
- 1 pinch Grated orange zest (organic, untreated)