Add vanilla and buttermilk, stirring well.
04In another bowl, mix together dry ingredients (except nuts and chocolate chips), then add in small amounts to the wet ingredients, stirring well after each addition.05Add the grated squash to the batter, and mix well.06Pour the batter into a greased and floured oblong 9x11 baking pan and sprinkle with nuts and chocolate chips.07Bake in preheated oven at 350 degrees for 15-20 minutes, or until it tests done.08Cut into squares when cool.