I made this cake many times with my daughter when she was growing up. It’s easy and fun! I believe it was a Betty Crocker recipe, but I don’t remember. Yes, it was that long ago.
18.25 ounce boxes of cake mix have been replaced by 16.5 ounce and 15.25 ounce boxes. To compensate for the volume loss in a 16 ounce box, whisk 6 tablespoons all-purpose flour into the dry cake mix before proceeding with the recipe. To compensate for the volume loss in a 15.25 ounce box, add 1/2 cup + 3 tablespoons all-purpose flour and 1/4 teaspoon baking powder.
Find it online: https://simplygreatrecipes.com/springtime-bunny-cake/