1 Standard English loaf pan (30 × 11 cm / 12 × 4 in)
Ingredients
For the batter:
2largeeggs
⅔cupsugar
⅔cupoil
⅔cupwhite yogurt (around 3% fat, or slightly richer if preferred)
1tspvanilla extract or paste
1 cup + 2 tbsps flour
1½tspsbaking powder
Pinch of salt
For the coffee swirl:
1½-2tbspespresso or 1 tbsp strong instant coffee, dissolved in 1½ tablespoons hot water
½tspespresso powder for baking (optional, for stronger flavor)
70gdark chocolate chips
Instructions
Preheat the oven to 170°C (340°F) and line a standard English loaf pan with parchment paper.
Make the coffee first: make your espresso or instant coffee in hot water. Set it aside to cool.
In a large bowl, whisk together the eggs, sugar, and oil until smooth.
Add the yogurt and vanilla, and mix again until the batter looks creamy and even.
Sift in the flour, baking powder, and salt. Mix gently until just combined — don’t overmix.
Transfer about 1 cup of batter to a separate bowl. Stir the cooled coffee into that smaller portion, add the espresso powder for baking, then add the chocolate chips.
Alternate spoonfuls of the plain and coffee batter into your loaf pan, then use a knife or skewer to make two gentle S-shaped swirls. Check out the video instructions to see exactly how it’s done.
Bake for 35–40 minutes, or until a skewer inserted in the center comes out with a few moist crumbs.
Let the cake cool in the pan for 15 minutes, then transfer to a rack or plate to cool completely before slicing.