Preheat oven to 350 °F (175 °C). Brown the butter in your cast iron skillet. When done, remove the pan from the heat and swirl the butter around so it coats the side of the pan.
1 stick (8 tablespoons or 113 grams) unsalted butter
In a medium bowl, whisk together the flour, brown sugar, almond flour, baking powder, baking soda, and salt.
¾ cup (94 grams) all-purpose flour, ⅓ cup (75 grams) brown sugar, ¼ cup (28 grams) almond flour, ½ teaspoon baking powder, ½ teaspoon baking soda, ½ teaspoon salt
Measure out your buttermilk in a glass measuring cup, then add the brown butter and extracts and whisk together.
½ cup (120 milliliters) buttermilk, ½ teaspoon almond extract, ½ teaspoon vanilla extract
Gently fold the wet ingredients into the bowl with dry ingredients until just mixed.
Carefully add the batter to the skillet - it may still be hot! Scatter blueberries over the top, and bake for 16 to 18 minutes until golden and set in the center.
1 cup (200 grams) blueberries
Serve warm, scooped directly from the skillet, with whipped cream or vanilla ice cream.
vanilla ice cream or whipped cream