Heat oven to 325°F. Grease 9x5-inch loaf pan with shortening (do not spray with cooking spray); coat with flour. In 1-quart saucepan, heat 1/4 cup of the butter over medium heat 1 to 2 minutes, stirring constantly, until light golden brown (watch carefully because butter can burn easily). Immediately pour browned butter into large bowl. Cool 10 minutes.