For lemon and blueberry bundt cake, add the grated zest of 2 lemons to the batter. Stir in 150g/5½oz frozen blueberries. You may need to bake the cake for 5–10 minutes longer. Mix icing sugar ...
Brush the bundt tin with melted butter ... a rubber spatula between each addition. Add the lemon and orange zests, juices and rosewater and mix again. Sift the flour, baking powder, bicarbonate ...