There are many renditions of pistachio cake, but I believe this one to be the original. Through the years, Mum would always ask what kind of cake I would want for my birthday. My answer would almost always be "pistachio cake." To this day, this is one of my all-time favorites.
In large bowl, mix all ingredients together on medium speed for 2½ minutes. Pour into prepared pan and bake for 50 minutes.
Coo on wire rack for 15 minutes. Remove from pan and cool completely before frosting.
1 pt. whipping cream, whipped 1 package (4 serving size) instant pistachio pudding mix
Fold pudding mix into whipped cream. Frost pistachio cake.