Preheat your oven to 350°F. In a bowl, whisk together flour, baking soda, and salt. Place the Mini Eggs in a ziplock bag and crush them using a rolling pin or measuring cup. Set aside.
80 grams (2/3 cup) All-purpose flour, 1/4 teaspoon Baking soda, 1/8 teaspoon Salt, 1/2 cup Mini chocolate eggs
In a stand mixer or with a handheld mixer, cream together butter, brown sugar, and granulated sugar until light and fluffy (mix for around 3 to 5 minutes). Then mix in the egg yolk and vanilla extract until combined.
60 grams (1/4 cup) Unsalted butter, 55 grams (1/4 cup) Brown Sugar, 24 grams ( 2 tablespoons) Granulated Sugar, 1 Egg yolk,, 1 teaspoon Vanilla extract
Gently mix in the dry ingredients, crushed Mini Eggs, and sprinkles into the wet mixture at a low speed until just combined.
optional* 1/2 tablespoon Pastel non pareil sprinkles
Spread the dough evenly into a parchment-lined loaf pan and smooth the top with your hands or a spatula. Bake for 13–15 minutes, until the top is slightly puffed and golden. Let cool on a baking rack for 15 minutes before slicing and serving.