Preheat your oven to 180C (356F) or 160C (320F) for a fan forced oven. Line a cupcake tin with cupcake liners.
In the bowl of a stand mixer fitted with the paddle attachment, add the flour, baking powder, caster sugar and salt. Turn mixer on low speed and allow it to mix for a couple minutes to help everything combine well (alternatively you may do this by sifting the ingredients together). Add the softened butter and let it mix until it resembles a fine sand like texture.
Next, add milk, eggs, yogurt, oil and vanilla extract in a large jug and whisk well.
Add wet ingredients to dry ingredients in a slow and steady stream until no dry ingredients are visible. Scrape down the bowl, add ½ cup cookie butter and mix for another 20 seconds.
Fill each cupcake liner 3/4 of the way (using an ice cream scoop to transfer the batter into the cupcake liners makes this a quick and easy process otherwise you can use two tablespoons). Sprinkle the top of each cupcake liner with a generous amount of crushed cookies. Bake for 20-25 min or until a toothpick inserted comes out clean. Allow them to cool completely on a wire cooling rack before frosting.
To prepare cookie butter frosting combine frosting and cookie butter together.
Core the center of each cupcake and fill with cookie butter
Fit the end of a piping bag a Wilton 1M tip and frost in a swirl. Drizzle melted cookie butter. Finish off with a sprinkle of cookies.
STORAGE: store in an airtight container for up to 3 days (refrigerated or unrefrigerated).
CAKE: Recipe can be used for an 8” cake tin - adjust baking time to 30-40 min and bake on 180C
EQUIPMENT: Can be made using a hand mixer (always mix on lowest speed) or wooden spoon. Take care not to over mix the batter
OVEN TEMPERATURE: If you’re baking at home set your fan forced oven to 160C (320F).
BAKING TIME: These cupcakes typically bake on a lower temp and for a little longer than regular cupcake recipes. That’s what helps get that gorgeous even dome shape on top. The cupcakes don’t dry out. Bake your cupcakes for 20 min. If you insert a skewer and it comes out with wet batter, bake for an extra 5 min until a skewer inserted into the center comes out with moist crumbs.