Crock Pot Self Frosting Fudge Cake

2 1/4 cups chocolate fudge pudding cake mix
2 eggs
3/4 cup water
1/3 cup walnut halves
3 Tbs oil
1/4 cup chocolate syrup
1/4 cup warm water
3 Tbs sugar

Combine cake mix, 3/4 cup water, oil and eggs. Beat 2 minutes.
 Pour into greased cake bake pan. 
 sprinkle walnut halves over batter.  
Blend together choc. syrup, 1/4 cup water and sugar.
  Spoon syrup mixture evenly over batter. 
 Cover, bake in covered crockpot on high 2 hours.