Step 1

Whisk the flour, baking powder, and salt together. Set aside.

Step 2

Using a hand mixer or a stand mixer fitted with paddle attachment, beat the butter for 1 minute on high speed until creamy. On medium-high speed, beat in the granulated sugar until completely creamed and smooth, about 2 minutes. Add the egg and vanilla extract and beat on high until combined, about 1 minute. Scrape down the sides and bottom of the bowl as needed.

Step 3

Add the dry ingredients to the wet ingredients and mix on low until combined. If the dough still seems too soft, you can add 1 Tablespoon more flour until it is a better consistency for rolling.

Step 4

Divide the dough into 2 equal parts. Roll each portion out in a rectangle (about 9×7 inches) onto a floured silicone baking mat (or floured parchment paper) to about 1/4″ thickness. Spread 1 Tablespoon of melted butter onto each rectangle. Mix the granulated sugar and cinnamon together then sprinkle evenly over each.

Step 5

Working slowly, tightly roll up each rectangle into a 9-inch log. If the dough is cracking at all, use your fingers to smooth it out. Some cracks are OK. Chill the logs of dough for at least 2 hours. What I like to do is carefully transfer the logs to a cutting board or plate and cover loosely with plastic wrap.

Step 6

Preheat oven to 350°F (177°C). Line a large baking sheet with parchment paper or a silicone baking mat. (Always recommended for cookies.)

Step 7

Remove dough logs from the refrigerator. Cut into 1/2 inch slices. Place slices onto baking sheets about 2 inches apart.

Step 8

Bake for 10-11 minutes, until lightly browned on the sides. Remove from the oven, allow to cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely before icing.

Step 9

Whisk all of the icing ingredients together. Drizzle over cookies. Cover and store cookies at room temperature for up to 5 days.