Here are some tips for substituting maple syrup in recipes calling for granulated sugar.
In replacing one cup of granulated sugar:
Use 3/4 to 1 and 1/4 cups of maple syrup. Maple syrup is less sweet than granulated sugar. The amount you decide to use will be dependent on how sweet you want the finished product to be. Some experimentation may be necessary.
Because maple syrup contains more moisture than granulated sugar, decrease the amount of liquid called for in the recipe by 2 to 4 tablespoons for every cup of syrup used.
Add 1/4 to 1/2 teaspoon baking soda. Baking soda is useful in neutralizing the slight acidity of maple syrup, enabling batter to rise and form properly. (Do not add baking soda if the recipe calls for buttermilk, sour milk or sour cream, as these liquids will also act as neutralizers.)
Because syrup will tend to caramelize and burn on the top and edges before a batter using granulated sugar, decrease the oven temperature by 25 degrees Fahrenheit.
Combine syrup with the liquid in the recipe, or melt shortening and mix thoroughly with the liquid shortening. If the finished product has too coarse a texture you probably need to mix the syrup and liquid shortening more thoroughly.