Beat 1 egg white until soft peaks form, set aside.
Cream butter, add sugar and mix. Add in syrup and 1 whole egg.
In another bowl mix remaining dry ingredients together. Then slowly alternate adding dry ingredients, pumpkin and milk to butter mixture. Once all combined and mixed well, fold in whipped egg white.
Pour batter into greased cake or bundt pan, and bake at 350°F for 50-65 minutes.
For icing: mix first four ingredients together in a saucepan and bring to a boil. While mixing constantly, boil for 2 minutes, then remove from heat and whisk in icing sugar, and vanilla. Beat until starts to thicken, then pour over cake (will set up within a minute, so pour/drizzle fast!).