Preheat oven to 350°F. Prepare 3D Lamb Cake pan by greasing generously with vegetable shortening. Then add some flour and swirl around until it covers everywhere. Pour out excess. Set aside.
In mixing bowl, cream together butter, sugar, vanilla and eggs, beating until light and fluffy. Stir together dry ingredients in a medium bowl and add to creamed mixture, alternately with buttermilk while beating on low speed with electric mixer. Once combined, beat on medium low for 2 minutes.
Pour all but 1/2 cup of batter in prepared pan. Discard extra batter or make a cupcake. Bake for 50-55 minutes. Let cool. Carefully remove pans and place cake on serving plate.
Meanwhile, make the frosting. Beat softened butter on medium speed with an electric or stand mixer. Beat for 3 minutes until smooth and creamy. Add powdered sugar, cream, and vanilla extract with the mixer running on low. Increase to high speed and beat for 3 minutes. Add more powdered sugar if frosting is too thin or more cream if mixture is too thick.
Frost lamb cake. Add two small blue jelly beans for eyes and one small pink jelly bean (cut in half) for nose. Cover the body with coconut flakes.
To make grass, place shredded coconut in a large bowl. Add green food coloring and mix until combined. Place the green coconut around the base of the cake. Then add more jelly beans, if desired.