I love this recipe. I add chocolate chips, lemon zest, vanilla, top with a little brown sugar and keep the sugar at 1/2 cup. I only used 1/2 stick of butter and they are great. Today I tried Cranberries cut in half, lemon zest, white chocolate chips, vanilla. Excellent. You really don't have to increase the sugar if you put a little brown sugar on top and it gets golden brown.

Very good recipe. I did double the sugar and added 1 tsp vanilla. My oven time was 18-20 minutes. They were moist and enjoyed by the whole family.

This recipe was delicious! But the next time I make it I would double the sugar. This recipe also would work with 1 cup of any other fruit to substitute the blueberries.

To make a lower fat version I substituted smart balance for the butter and shortening, egg whites for whole egg and 1/2 cup whole wheat flour. I also added 1/4 tsp. of vanilla. My teen had two servings!

I dropped the blueberries and added 1 c of cranberries and 1 c chopped walnuts and made best cranberry muffins ever! The blueberry muffins with the vanilla and not doubling sugar was excellent.

I added a teaspoon of vanilla to the batter, and it tasted great without needing to double the sugar.

Great recipe. I also tried it with grated carrots and with strawberries. Both were good. I also doubled the sugar in all cases.

Great recipe, but you have to DOUBLE the SUGAR. The second time I made them with one cup of sugar, they were delicious. Also, the cook time in my oven was 15-18 minutes.

Good recipe. A little bitter; this was my 1st time making it. Next time I think I will double the sugar.