Blackberry Financiers

Melt butter in a medium saucepan over medium heat. Simmer until browned bits begin to form. Continue to simmer, frequently scraping up browned bits at bottom of pan, until fragrant and dark brown but not burnt, 6-7 minutes. Scrape butter and all browned bits into a medium bowl. Let cool for 3-4 minutes.

Meanwhile, process almonds and flour in a food processor until nuts are finely ground. Transfer to a medium bowl; whisk in 1 1/2 cups plus 2 tablespoons powdered sugar. Add egg whites; mix until smooth. Fold in honey.

Fold browned butter into batter. DO AHEAD: Batter can be made 3 days ahead. Cover and chill.