Poppy Seed Filling for Filled Biscuits (Kolache)

When I made this with Mom she insisted that I use a coffee cup to measure the poppy seeds - "a big one". When I asked why she said because that's the way her mother always did it.

1 large cup ground poppy seeds

1 cup milk

1 egg, beaten

1/2 tsp. salt

1 cup sugar

2/3 cup raisins (Mom ground or chopped them first)

1/3 tsp. cinnamon

1/2 tsp. vanilla

1 tlbs. butter

1 cup crushed graham crackers

Cook everything except the graham crackers until thick. Add the crushed graham crackers after cooking.

Cook for