1 block butter, heated in a small saucepan until brown, then cooled until thick (do not refrigerate)
1 c sugar
3 eggs
1 tsp vanilla
2 c flour
1/2 tsp baking powder
1/2 tsp salt
2 c add-ins (chopped nuts, chopped dried fruit)
Cut a piece of parchment paper 16"-17" long. Cut in half. On each half, draw a guide rectangle, 14" x 1 1/2". Turn parchment over and place each sheet on a large, rimmed baking sheet. Preheat oven to 350 degrees. In a large mixing bowl, combine butter and sugar. Add eggs, beating well after each addition. Add vanilla. Add flour, baking powder and salt. Stir until well combined. Fold in add-ins. Using 2 rubber spatulas or spoons, place batter on parchment papers, within guide rectangles. Bake for 26 minutes, rotating sheets midway through baking. Place logs on cooling racks until comfortable enough to handle. Preheat oven to 325 degrees. Using a serrated knife, make 1/2" slices on the diagonal. Place slices (on a cut surface) in a single layer on baking sheets. Bake for 20 minutes, rotating sheets midway through baking. remove to wire rack and cool completely.