From Sunset 12/12 issue. I love orange bitters, but did not think you could really make it yourself. I have not tried this yet, but am looking forward to trying. This will keep up to one year refrigerated.
Preheat oven to 250 deg F. Remove zest from oranges with a vegetable peeler. (Use oranges for some other purpose). Bake until zest dries, starts to curl up and begins to brown, about 20-25 minutes. Let cool.
Put all ingredients except sugar in a 1 quart glass jar and seal tightly. Let sit in a cool, dark place for two weeks.
Strain liquid into a 1 1/2 to 2 quart jar, saving the flavorings. Set aside.
Put flavorings in a small saucepan with 2 cups water. Cover and bring to a boil, then reduce heat and simmer for 10 minutes. Remove from heat.
Cook sugar in a small saucepan, lifting and shaking the pan occasionally, until the sugar caramelizes and turns deep amber, 8 to 10 minutes.
Pour the caramel into the liquid in the saucepan - it will bubble furiously and may firm up. If necessary, return to medium heat and cook, stirring, for a few minutes until the caramel melts.
Set pan in a bowl of ice water until the liquid is cold, about 10 minutes.
Pour this liquid into the jar with the first liquid (from step 3). Seal and let stand in a cool, dark place for five days.
Strain this final mixture through cheesecloth into a glass measuring cup and discard the flavorings.