Whisk together both flour and salt and add them to the butter mixture. The mixture will have the consistency of a paste.
1¼ cup Almon flour, ¼ cup All-purpose flour, ¼ teaspoon Salt
Use your clean hands to make small globes the size of an inch in diameter and set them aside.
Store leftover frangipane in the refrigerator, covered, for up to 1 week or freeze for up to 2 months.
How To Make The Muffins
Preheat the oven to 400°F, and line the muffin pan with the liner. Line the pan in an alternate order. Leave one empty cavity between the muffin liners.
Whisk all the dry ingredients, including sugar together. Set aside.
2 cups All-purpose flour, ⅓ cup Almond flour, 1 tablespoon Baking powder, 1 teaspoon Baking soda, ½ teaspoon Salt, 1 cup Sugar
Whisk the sour cream, buttermilk, eggs, oil, melted butter, and vanilla extract in a separate bowlusing a hand whisk or a fork.
½ cup Sour cream, ¾ cup Buttermilk, 2 Eggs, ¼ cup Oil, 1 tablespoon Butter, 1½ teaspoon Almond extract, 2 teaspoon Vanilla extract
Add the above mixture to the dry ingredients and gently mix until you don't see any trace of dry ingredients. Do Not Overmix.
Let the batter sit on the counter to rest for 10-15 minutes. This will hydrate the flour and leads to fluffier muffins.
Pour one large scoop of the batter into each muffin liner, place one Frangipane globe in the center and fill the liner with more batter. Be sure to fill the liners to the top.
How To Make The Streusel
Mix all-purpose flour, almond flour, granulated and brown sugar, and cold butter in a bowl using a fork. Do not blend the ingredients; we need clusters of the mixture.
¼ cup All-purpose flour, ¼ cup Almond flour, ⅓ cup Granulated sugar, ⅓ cup Brown sugar, 4-5 tablespoon Butter
Sprinkle about one tablespoon of almond streusel on top of each muffin and cover their top with silvered a lmonds. Bake for 20 to 25 minutes or until the top looks golden and set. Let them cool in the pan for 10 minutes, then transfer them to the cooling rack to cool fully.