Creamy Butter Cookies! Crispy on the outside, with clear patterns, a beginner's step-by-step tutorial

Cookie biscuits are the top choice for beginners in baking. They are easy to make, have a high success rate, and can be used as daily snacks or gifts. Many beginners make cookies that are hard, lack patterns, and are not crispy. Today, I will teach you the classic butter cookie recipe. The cookies have clear patterns, are crispy when eaten, and have a strong butter flavor.
Ingredients: 100g butter, 30g powdered sugar, 10g fine sugar, 30g egg whites, 130g low-gluten flour, 10g milk powder.
Steps: Soften the butter at room temperature, it should be able to be pressed into an indentation with your fingers, but not melted into a liquid. Add the powdered sugar and fine sugar, and beat until the color becomes lighter and the mixture becomes fluffy and fine. Add the egg whites in two portions, each time fully beating and blending to avoid oil and water separation.
Sift in the low-gluten flour and milk powder, and use a spatula to mix until there is no dry flour. Put it in a piping bag and squeeze out your favorite patterns. Preheat the oven, bake at 170 degrees with both upper and lower heating for 18 minutes. The edges should be slightly golden brown when done.
After cooling, the cookies become crispy instantly. They have a strong butter flavor and a moderate sweetness that is not greasy. They can be stored in an airtight container for up to half a month. They are perfect for watching TV series or pairing with coffee and milk. Simple and comforting.