Churros from The Brazilian Kitchen: 100 Classic and Contemporary Recipes for the Home Cook by Leticia Moreinos Schwartz

Ingredients

• 1 tablespoon ground cinnamon
• 200 g (7 oz) sugar, plus 1 teaspoon
• 350 ml (12 fl oz) water
• 1 tablespoon olive oil
• 140 g (5 oz) plain flour, plus extra for dusting
• 1 teaspoon baking powder
• 1 x 397-g (14-oz) tin dulce de leche, at room temperature
• ⅛ teaspoon salt
• 2 litres vegetable oil, for deep-frying