My First Whole Wheat Loaf - F.A.I.L

The recipe I used was taken from here:

http://www.tammysrecipes.com/homemade_wheat_bread

Homemade Wheat Bread

A slightly sweet, healthy half-whole-wheat bread -- our #1 favorite wheat bread recipe! (Scroll down for instructions on making this a 100% whole wheat loaf!)

Yield: 

1 loaf

Ingredients: 

1 cup warm water (110-115 degrees F)
1 tablespoon milk
2 tablespoons oil
2 tablespoons honey
2 tablespoons brown sugar
1 teaspoon salt
1 1/2 cups all-purpose flour (see additional notes for a 100% whole wheat version)
1 1/2 cups whole wheat flour
2 teaspoons instant active dry yeast (active dry yeast will work also; get more info on active vs. instant active dry yeast here!)

Instructions: 

1. *Combine first 6 ingredients in a large mixing bowl; stir.

2. Add flours and yeast, and knead until dough is smooth and elastic, about 10-15 minutes. Place dough in a greased bowl, turning once to grease top. Cover with a clean towel and let rise until doubled, about 40 minutes.

3. Punch dough down; knead for a few minutes until smooth and then form into a loaf. Place in greased loaf pan and cover. [more info on loaf pan sizes] Let rise in a warm place until almost doubled in size, about 30 minutes.

4. Bake at 350 degrees for 30-35 minutes. If loaf starts browning too soon, lightly lay a piece of foil on top of the loaf to prevent too much darkening.

5. Remove bread from oven and allow to rest in pan for a few minutes. Remove to a wire rack and cover with a cloth. Slice and enjoy while still warm! (Easier-slicing tips here!) Leftover bread can be stored in an airtight bag or frozen until needed.

It turned out to be a little uncooked at the bottom center even though I increased the baking time from 35 minutes to 50 minutes and the exterior looked too brown. There was also a huge tunnel within the bread. It turned out that I did not knead the bread well enough after the first rise. I was probably worried about the dough turning 'tough'. But I did have a slice from one end of the bread and it taste so good!

I was kinda disappointed so I did not take any pictures. The recipe is good; the bread is soft and flavorful they can be eaten plain. It is just my techniques that I need to improve on.