Line a baking tray or large plate with parchment paper. Set it aside before starting the recipe. This step makes it easier to place the cookies quickly once the mixture is ready.

Place butter, sugar, milk, and salt into a medium saucepan. Heat over medium heat while stirring gently. Once the mixture starts bubbling, let it boil for one minute to create the perfect texture.

Remove the saucepan from the heat. Stir in fresh lemon juice, lemon zest, and vanilla extract. The warm mixture will smell bright and fresh, making the kitchen feel wonderfully inviting and cozy.

Add quick oats and white chocolate chips into the saucepan. Stir carefully until everything becomes evenly coated. The white chocolate melts slightly and creates a creamy texture throughout the cookie mixture.

Use a spoon or cookie scoop to drop small portions onto the prepared tray. Flatten the tops slightly if needed. Work quickly because the mixture starts setting as it cools down.

In a small bowl, whisk powdered sugar, lemon juice, and lemon zest until smooth. The glaze should look creamy but pourable. Add a few drops of lemon juice if it feels too thick.

Drizzle the lemon glaze over the cookies using a spoon. This step adds extra sweetness and bright citrus flavor. The glaze also makes the cookies look beautiful and bakery-style.

Allow the cookies to cool at room temperature for about 20 minutes. The cookies will firm up as they rest. Once set, they are ready to enjoy with coffee, tea, or milk.