Preheat the oven to 425 degrees. Spray a donut pan with cooking spray and set aside.

In a large bowl combine the flour, baking powder, and salt.  Mix well and set aside.

In a medium bowl cream together the butter and sugar.  Add in the eggs and vanilla and mix well.

Stir in the milk and vanilla yogurt until well mixed.

Add the butter mixture to the flour mixture and mix well.

Divide the batter into three bowls.  Leave one bowl white, dye one bowl orange, and dye the third bowl green. 

Put each batter into a zip top baggie and cut off the end. Pipe the batter into the donut pan. You will make 4 donuts of each color.

Bake for 10 minutes. Allow to cool for 2 minutes in the pan and then remove to a wire rack and cool completely.

To make the frosting beat the butter in a large bowl use a mixer on medium speed.  

Add in the powdered sugar and milk and mix on medium high speed or until well combined. Add in vanilla and stir.

Divide the frosting into 3 bowls and color it green, orange, and black.  

Place the frosting into piping bags with different tips and pipe onto the donuts.  I used two tips to make fur and one skinny tip to make spider webs but use your imagination.

Top the donuts with edible eyes, sprinkles, and edible spiders if desired.