Blueberry Zucchini Snack Cake with Lemon Buttercream ~ this easy snack cake combines the best of summer into one delicious treat, and since blueberries, zucchini, and lemons are available all year round, you never have to go without this yummy cake!
Lightly grease and flour a 9x13 baking pan.
Beat the eggs, oil, vanilla and sugar until well blended. Fold in the zucchini.
Whisk the flour, salt, baking powder, and baking soda to combine. Slowly add it to the wet mixture, mixing just enough to blend.
Fold in the blueberries, and pour the batter into the prepared pan. Bake for about 50 minutes, just until the top is turning golden and a toothpick inserted in the center comes out without wet batter clinging to it. Cool on a rack.
To make the frosting, put the softened butter into the bowl of a food processor and process until creamy. Add the sifted powdered sugar, one cup at a time, processing till smooth after each addition. After the second cup of sugar add in the lemon juice. Scrape down the sides of the machine as necessary. Adjust the texture by adding a little more lemon or a little more sugar.