Coffee Sandwich Cake

I love tea cakes - Cakes especially tea cakes are everyone's favourite at home. Generally I bake dark chocolate cake as my son just loves them . Today I tried to break free of chocolate but landed up with coffee. I chanced upon this recipe at "all recipes.com". I ve tweaked it a little to suit my taste. 

Ingredients :

• Flour.	1 3/4 cup
  baking powder	1 1/2tsp
  salt	1/2 tsp
  Butter	1/4 cup ( 55 gms ) unsalted*
  Oil.	1/3 cup ( 60 gms)
  sugar.	3/4. fine granulated
  eggs	3
  milk	1/2 cup
  vanilla  essence	2 tsp
  instant coffee granules	4 tsp
  water	2 tbsp ( boiling )
  Walnuts.	1/2 cup chopped into bits (optional)
  Flour.	1 tbsp.

Note : if using salted butter omit salt, like I did. I love walnuts in my cakes so couldn't resist using them in this cake too , although the original did not  have it.

Method:

1. Preheat oven to 350 degrees F (175 degrees C). Grease and flour a 9" pan.
2. Dissolve coffe granules in 2 tbsp of boiling water.
3. Roll walnuts in a tbsp of flour.
4. Sift the flour, baking powder, and salt (if using) into a large bowl.
5. Use an electric beater to beat the butter , oil and sugar in a separate large bowl until light and fluffy. 
6. Now add eggs one at a time, into the butter mixture and beat well.
7. Beat in 1/2 of the flour mixture, then add milk  and vannila essence and beat.
8. Now add the remaining flour and beat well.
9. Transfer a little less than 1/3 of the batter to a small bowl.  Add coffee solution to small bowl.
10. Mix walnuts in the remaining batter.
11. Spoon 1/2 of the vanilla batter into the prepared baking pan, top with the coffee batter. Spoon the remaining vanilla batter over the coffee layer. 
12. Bake in the preheated oven until a toothpick inserted in the center comes out clean, 35 to 40 minutes. Cool on wire rack for 30 minutes