Prepare toppings for tacos.
For fry bread, sift flour, backing powder and salt. Combine milk with dry ingredients. Knead well with extra flour.
Divide into 6 portions. Roll 1/8" thick rounds.
Fry in 1/4" hot oil, turning so that each side cooks. Bread will puff out.
Top each fry bread with meat, cheese, lettuce, tomatoes and sour cream.