My dad remembers such a bread, made by his Swedish grandmother way back when. After much searching he recently found this, and I'm about to try it out for him:

Kake Brod (Swedish Flat Bread)
Source: Cookbook USA

1 pkg. yeast
1/4 cup warm water
1 tbsp. honey
1 1/3 cups warm milk
2 tsp. salt
2 tbsp. softened butter
4 to 5 cups unbleached white flour

Sprinkle yeast on warm water. Add honey and set aside.

In large bowl, mix warm milk, salt, butter and 2 cups of flour. Beat with mixer or wooden spoon until smooth. Gradually add rest of flour. Turn onto floured board and knead until all the flour is used and dough is not sticky. Invert bowl over dough and let rest 10 minutes.

Knead 8 to 10 minutes until smooth and elastic. Return dough to bowl and let rise about 1 hour.

Punch down, divide in 2 parts.

Butter 2 round pizza pans or cookie sheets. Roll dough to fit pans. Place in pans and press the edges with fingers to make it fit the pan. Prick all over with a fork. Cover with damp cloth and let rise until doubled in thickness, about 30 minutes.

Bake in a 350 degree oven for about 10 to 15 minutes until golden brown. Butter the top generously with melted butter as soon as it is removed from the oven. Cool slightly on a wire rack before serving.