Prepare a dip by combining the sour cream, mayonnaise, sugar, lemon ice, and basil in a medium-size mixing bowl. To make the trees, cut each carrot in half widthwise and then lengthwise into four pieces.20 Assemble on a plate by laying three carrot pieces side by side for a trunk with the broccoli florets as the leaves. Spread dip under the trunks for the forest floor.