For this Horse Birthday Cake, I made a double butter yellow cake mix. I used a large 9×11 cake pan, froze the cake and outlined the major part of the head (excluding the ears) with a knife before cutting.
With the extra parts, I cut out the ears and a piece for the eye so that it was raised. I outlined the neck area, with my finger, pressed my thumbs in for the nostrils and outlined the mane with black frosting using a star tip. And colored the eye black.
The main frosting is buttercream frosting with Hershey cocoa and milk added till the desired color is made. I reserved some to color black with Wilton frosting color because black is so hard to achieve with food coloring.