From allrecipes.com (there are other variations on the website too):
Amish Friendship Bread Starter:
Ingredients
1 (.25 ounce) package active dry yeast
1/4 cup warm water (110 degrees F/45 degrees C)
3 cups all-purpose flour, divided
3 cups white sugar, divided
3 cups milk
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DIRECTIONS:
In a small bowl, dissolve yeast in water. Let stand 10 minutes. In a 2 quart container glass, plastic or ceramic container, combine 1 cup flour and 1 cup sugar. Mix thoroughly or flour will lump when milk is added. Slowly stir in 1 cup milk and dissolved yeast mixture. Cover loosely and let stand until bubbly. Consider this day 1 of the 10 day cycle. Leave loosely covered at room temperature.
On days 2 thru 4; stir starter with a spoon.
Day 5; stir in 1 cup flour, 1 cup sugar and 1 cup milk.
Days 6 thru 9; stir only.
Day 10; stir in 1 cup flour, 1 cup sugar and 1 cup milk. Remove 1 cup to make your first bread, give 2 cups to friends along with this recipe, and your favorite Amish Bread recipe. Store the remaining 1 cup starter in a container in the refrigerator, or begin the 10 day process over again (beginning with step 2).
Editor's Note:
Once you have made the starter, you will consider it Day One, and thus ignore step 1 in this recipe and proceed with step 2. You can also freeze this starter in 1 cup measures for later use. Frozen starter will take at least 3 hours at room temperature to thaw before using.
Amish Friendship Bread:
INGREDIENTS:
1 cup Amish Friendship Bread Starter
2/3 cup vegetable oil
3 eggs
2 cups all-purpose flour
1 cup white sugar
1 teaspoon ground cinnamon
1/2 teaspoon salt
1/2 teaspoon baking soda
1 1/4 teaspoons baking powder
1 teaspoon vanilla extract
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DIRECTIONS:
Preheat oven to 350 degrees F (175 degrees C). Grease 2 (9x5 inch) loaf pans.
In a large bowl, combine the Amish bread starter with oil, eggs, 2 cups flour, 1 cup sugar, 1 teaspoon ground cinnamon, 1/2 teaspoon salt, 1/2 teaspoon baking soda, 1 1/4 teaspoons baking powder, and 1 teaspoon vanilla. Mix well. Pour into prepared loaf pans.
Bake in preheated oven for 50 to 60 minutes.