1Heat oven to 350°F. Grease 12-cup fluted tube cake pan; lightly flour. In large bowl, stir water, oil and eggs with fork. Stir in muffin mixes until moistened. Pour into pan; spread evenly.
2Bake 50 to 55 minutes or until toothpick inserted in center comes out clean and top is golden brown. Cool in pan 15 minutes. Turn upside down onto heatproof serving plate or cooling rack. Remove pan; cool cake completely.
3In small bowl, mix powdered sugar, butter and lemon peel. Stir in lemon juice until glaze is smooth and can be drizzled easily. Spoon glaze over top of cake, letting some drizzle down side.