I always let Olivia turn the oven dial, it makes her feel like a real baker. Preheat to 350°F (175°C) and line your baking sheet with parchment.
In a medium bowl, whisk together the [flour], [baking powder], and [salt]. Olivia loves “white powder whisking,” as she calls it.
Beat the [butter] and [granulated sugar] until light and fluffy, about 2 minutes. This step always smells like sweet beginnings in my kitchen.
Mix in the [egg] and [vanilla extract] until smooth. Olivia insists on cracking the egg every single time.
Gradually mix the dry ingredients into the wet ingredients until a soft dough forms.
Roll the dough into a 12x10-inch rectangle on parchment. Olivia always checks the edges for “evenness patrol.”
Brush the dough with [melted butter], then sprinkle evenly with [brown sugar] and [cinnamon].
Roll the dough tightly into a log, wrap, and refrigerate for 1 hour. This is when Olivia and I clean up and tell baking stories.
Slice into ½-inch rounds, place on baking sheet, and bake 12–15 minutes until lightly golden.
Whisk together [powdered sugar], [milk], and [vanilla extract]. Drizzle over cooled cookies, Olivia always sneaks one at this point.