Lemon-Lime Cake

Ingredients

• 200g (1.6 cups) flour
• 200g (1 cup) sugar
• 8g (2 teaspoons) baking powder
• 1/2 teaspoon of salt
• 2 eggs
• 120g (1/2 cup) kefir (or yogurt)
• 2 lemons
• 1 lime
• 150g (3/4 cup) sugar for glaze