Zucchini-Chocolate Chip Muffins

http://allrecipes.com/Recipe/Zucchini-Chocolate-Chip-Muffins-2/Detail.aspx?evt19=1

I didn't have a shredder so my mum helped and cut the zucchini into thin strips. I added about 2 cups of shredded zucchini. I also crush the walnuts into small pieces. I used about 1/4 choco chip because that all I had. I also didn't have cinnamon but had cinnamon sugar, which I made a few years back, I just wing it with it.

The batter became sticky and gooey-looking which is good so it can hold the added things in place and not sink to the bottom.

It looks good but when I open the oven I could smell a hint of baking soda in the air. I was concern that my muffin will taste bitter. As I feared, I could taste a hint of bitterness on my first bite. I don't know, what went wrong. Is it because I didn't add enough cinnamon and choco chips to cover the baking soda bitterness? I followed the recipe other than the cinnamon and choco chips...But other than that the muffin was moist and the zucchini kind of dissolved, couldn't even taste it.

1 1/2 cups all-purpose flour
3/4 cup white sugar
1 teaspoon baking soda
1 teaspoon ground cinnamon
1/2 teaspoon salt
1 egg, lightly beaten
1/2 cup vegetable oil
1/4 cup milk
1 tablespoon lemon juice
1 teaspoon vanilla extract
1 cup shredded zucchini
1/2 cup miniature semisweet chocolate chips
1/2 cup chopped walnuts

Preheat oven to 350 degrees F (175 degrees C). Grease 12 muffin cups, or line with paper muffin liners.

Combine flour, sugar, baking soda, cinnamon, and salt in a bowl. Mix egg, oil, milk, lemon juice, and vanilla extract in another bowl; stir into dry ingredients until just moistened. Fold in zucchini, chocolate chips, and walnuts. Fill prepared muffin cups 2/3 full.

Bake in preheated oven until a toothpick inserted into the center of a muffin comes out clean, 20 to 25 minutes.

I also add a crumb topping. To test it out. The butter make the topping taste really good and it was crunchy.

1/2 cup oats

1/2 cup brown sugar

1/4 cup of flour

1/4 t. cinnamon

1/4 cup butter, cubed. 

Use fork to combine. Looking like coarse cornmeal, sprinkle over muffin cups before baking.