Cake:
• 3/4 cup all-purpose flour
• 1/2 cup unsweetened cocoa powder
• 1/4 teaspoon baking soda
• 1/4 teaspoon ground cinnamon
• 4 large eggs
• 1/4 teaspoon salt
• 1 cup granulated sugar
• 2 teaspoons finely grated lemon peel
Glaze:
• 2 tablespoons water
• 1 cup powdered sugar
• 1/4 cup unsweetened cocoa powder
• Pinch salt