Can i use granulated sugar or confectioner's sugar instead of castor sugar in coconut bread?

I'm using this recipe for coconut bread: Whisk together 2 eggs, 150ml coconut milk, and 150ml milk. Sift together 2 1/2 cups plain flour, 2 tsp baking powder, 2 tsp cinnamon, 1 cup castor sugar, and 1 cup flaked coconut. Add wet to dry and stir in 75 grams melted butter. Bake in a bread loaf pan for 1 hour at 190 C.
It calls for castor sugar, but all I have is granulated sugar and confectioner's sugar. I was thinking about using a half cup of confectioner's sugar and a half cup of granulated sugar, but I'm not sure how that could affect the recipe. Can I use granulated sugar or confectioner's sugar instead of castor sugar, or some combination of the two?

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3 Comments

Alison February 4, 2015
Confectioner's sugar has cornstarch in it. I wouldn't use as a substitute for castor sugar.
 
cookbookchick January 25, 2015
I would just use granulated sugar.
 
Carrie M. January 25, 2015
You can make your own castor sugar by grinding regular granulated sugar to a finer grind. I use a food processor but a spice or coffee grinder works too!
 
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