Ingredients
- 2 1/2 cups cake flour (Easily make by replacing 1 tablespoon per cup of AP flour with cornstarch, sift together several times)
- 1 1/2 tablespoons baking powder
- 1 teaspoon salt
- 2 cups sugar
- 1/3 cup milk (or buttermilk)
- 6 eggs, whites only
- 12 tablespoons butter, unsalted - room temp.
- blackberries, 12 ounces
- 1/2 to 1 cup sugar, adjust by personal taste
- 1/2 lemon, juice and zest
- 6 tablespoons flour
- 1 cup milk
- 1 cup vanilla sugar, fine/caster (granulated sugar in food processor until more fine)
- 1 cup butter
- 1 teaspoon vanilla extract (clear works best) (Use good brand. Like Rodelle)
- 1 vanilla bean (alternatively add additional 1 teaspoon vanilla extract if omitting bean pulp)
- 2 tablespoons bourbon or whiskey
Cupcake Base
Blackberry Glaze/Puree
Vanilla Bean Bourbon Frosting (Frosts 24 cupcakes, lightly)
Instructions
- If you do not have cake flour, make it! For every 1 cup all-purpose flour, remove one tablespoon flour and replace with one tablespoon cornstarch. Sift together very well, several times.
- Preheat oven to 375 F.
- Combine dry ingredients: cake flour, salt, baking powder. Sift well and set aside.
- Place butter and sugar in mixer. Mix on medium speed for 2-3 minutes until combined and smooth, fluffy.
- Mix egg whites and milk in bowl. Whisk until combined. Set aside.
- Slowly mixing butter/sugar combination in mixer, add 1/3 of the dry ingredients that were sifted together.
- Slowly add milk/egg mixture in 2-3 batches. Ensure mixed well before adding more.
- Add remaining dry ingredients and mix until combined. Scrape bowl sides and mix for a few more seconds.
- Fold in part of the blackberry glaze (below). I prefer to not mix this very well, leaving patches of puree in mix.
- Fill cupcake liners with mixture (halfway).
- Bake 15-20 minutes. Check for toothpick to come out clean.
- Remove and let cool completely.
- Mix blackberries, sugar and lemon juice and zest in small saucepan. Heat over medium heat until berries start to burst. Remove from heat and cool.
- Push mixture through strainer/sieve with spatula to remove seeds.
- Combine flour and milk in saucepan over medium heat.
- Stir constantly until reduced and thick. Look for a paste-like consistency. Stop when you can see the bottom of the pan remain when stirring through mixture.
- Remove and cool (ok to refrigerate and stir to speed up).
- Cream butter and vanilla sugar 2-3 minutes until creamed and fluffy.
- Add flour mixture and mix at medium/medium-high speed until mixed thoroughly. _(Highly recommend the beater blade. It does an amazing job incorporating air and making fluffy frosting.)_
- Mix in vanilla extract and bourbon/whiskey.
- Pipe frosting on cupcakes, decorate with additional blackberry glaze and whole blackberry.
Cupcakes
Blackberry Glaze / Puree
Vanilla Bean Frosting
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