In a bowl, soak chia seeds with half of the water for 10 minutes until they form a thick gel-like mixture. Meanwhile, pulse pitted dates with half of the water into a paste. Then, combine 'chia egg', date paste, soy yogurt, and cold coffee in a bowl.
Add wholemeal flour, baking soda, cocoa powder, hot chilli powder, and dark chocolate chips. Mix until the ingredients are well incorporated.
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{{/ items}} {{^ items}} {{/ items}}Pour the batter into a muffin tray filling the cases at two-thirds and sprinkle with extra chocolate chips.
Bake the muffins for 15 minutes at 220°C (425°F), cool down on a wire rack, and garnish with chilli flakes.