Years ago, I added some zucchini to a peanut butter bar I had created, and this time I wanted to try adding it to a cake. The zucchini makes the cake super moist but doesn’t get in the way of the chocolate and peanut butter goodness. —Marilyn Blankschien, Clintonville, Wisconsin


Test Kitchen tips
  • If you like a chunky streusel topping, squeeze it into clumps as you sprinkle it over the batter.
  • The cinnamon really comes through in the topping. Leave it out if you're not a fan.
  • buttermilk

    To substitute for each cup of buttermilk, use 1 Tbsp. white vinegar or lemon juice plus enough milk to measure 1 cup. Stir, then let stand 5 min. Or, use 1 cup plain yogurt or 1-3/4 teaspoon cream of tartar plus 1 cup milk.