20 September 2026
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THE UNIVERSAL GASTRONOMY AUTHORITY
World Kitchen Journal
London Fog Cookies
Technique
By Jean-Luc Moreau, the Technique desk · 6d ago · United Kingdom · 3 min ·

London Fog Cookies

12 tablespoons/169 grams unsalted butter

Ingredients · Servings 8 cookies
  • 12 tablespoons/169 grams unsalted butter
  • 3 Earl Grey teabags (or 1 ½ tablespoons/6 grams tea leaves)
  • ½ teaspoon culinary lavender, optional (see Tip), plus more for decorating
  • ½ cup plus 2 tablespoons/116 grams granulated sugar
  • ½ packed cup/100 grams light brown sugar
  • 2 teaspoons vanilla extract
  • ½ teaspoon kosher salt, such as Diamond Crystal
  • 1 ½ cups/206 grams all-purpose flour
  • 1 teaspoon baking powder
  • ½ teaspoon baking soda
  • 1 large egg/50 grams
  • 3 tablespoons/42 grams unsalted butter
  • ¾ cup/93 grams powdered sugar
  • 1 tablespoon/12 grams whole milk
  • ½ teaspoon vanilla extract
  • Salt
Method · 1 h 55 min
  1. In a small saucepan over medium heat, add the butter. Once the butter is mostly melted, cut open the teabags, add the tea and stir for a minute. Add the lavender, if using, then remove the pot from heat. Steep, covered, for 10 minutes.
  2. In a mixing bowl, combine the granulated sugar, brown sugar, vanilla and salt. To a small bowl, add the flour, baking powder and baking soda and whisk to combine.
  3. Pour the tea-infused butter over the sugar. Using a silicone spatula, vigorously stir to combine. Make sure the batter is not sizzling hot, then add the egg and vigorously stir for 1 to 2 minutes to combine while cooling down the batter. Add the dry ingredients and mix until there are no dry flour spots. Chill the cookie dough uncovered for 10 minutes in the fridge.
  4. When ready to bake, divide the dough into eight ¼-cup balls (a 4-tablespoon scoop is helpful here) and place on the small sheet pan (you should have 8 balls, each weighing about 80 grams). Transfer the cookie balls to a small parchment-lined sheet pan or a large plate and freeze for 45 minutes, uncovered, until firm to the touch.
  5. Arrange racks in the upper and lower thirds of the oven. Heat the oven to 350 degrees. Line two large baking sheets with parchment paper. Arrange half of the frozen cookie dough on each sheet, leaving 5 inches between each cookie.
  6. Bake for about 16 minutes, until the cookies look lightly golden and puffed up, while the centers still look a bit underbaked. Firmly knock the bottom of the pans against a hard heat-proof surface a few times to flatten the cookies. Cool for 5 minutes, then transfer the cookies to a cooling rack to cool completely.
  7. In a microwave-safe bowl, microwave the butter for about 30 seconds, until very soft but not completely melted. Add the sugar, milk, vanilla and a tiny pinch of salt. Whisk until smooth.
  8. Drizzle one or two thick stripes of frosting on each room-temperature cookie using a silicone spatula. Decorate with more lavender if you like. The glaze will take a moment to set and will maintain a softer consistency, so it’s better if the cookies are not stacked right away. Store in an airtight container or zip-close bag for up to 2 days.

Step 1 In a small saucepan over medium heat, add the butter. Once the butter is mostly melted, cut open the teabags, add the tea and stir for a minute. Add the lavender, if using, then remove the pot from heat. Steep, covered, for 10 minutes.

Step 2 In a mixing bowl, combine the granulated sugar, brown sugar, vanilla and salt. To a small bowl, add the flour, baking powder and baking soda and whisk to combine.

Step 3 Pour the tea-infused butter over the sugar. Using a silicone spatula, vigorously stir to combine. Make sure the batter is not sizzling hot, then add the egg and vigorously stir for 1 to 2 minutes to combine while cooling down the batter. Add the dry ingredients and mix until there are no dry flour spots. Chill the cookie dough uncovered for 10 minutes in the fridge.

Step 4 When ready to bake, divide the dough into eight ¼-cup balls (a 4-tablespoon scoop is helpful here) and place on the small sheet pan (you should have 8 balls, each weighing about 80 grams). Transfer the cookie balls to a small parchment-lined sheet pan or a large plate and freeze for 45 minutes, uncovered, until firm to the touch.

Step 5 Arrange racks in the upper and lower thirds of the oven. Heat the oven to 350 degrees. Line two large baking sheets with parchment paper. Arrange half of the frozen cookie dough on each sheet, leaving 5 inches between each cookie.

Step 6 Bake for about 16 minutes, until the cookies look lightly golden and puffed up, while the centers still look a bit underbaked. Firmly knock the bottom of the pans against a hard heat-proof surface a few times to flatten the cookies. Cool for 5 minutes, then transfer the cookies to a cooling rack to cool completely.

Step 7 In a microwave-safe bowl, microwave the butter for about 30 seconds, until very soft but not completely melted. Add the sugar, milk, vanilla and a tiny pinch of salt. Whisk until smooth.

Step 8 Drizzle one or two thick stripes of frosting on each room-temperature cookie using a silicone spatula. Decorate with more lavender if you like. The glaze will take a moment to set and will maintain a softer consistency, so it’s better if the cookies are not stacked right away. Store in an airtight container or zip-close bag for up to 2 days.

Cultivated and processed to ensure safe consumption, culinary lavender has a palatable, less soapy flavor and can be found in specialty stores, local lavender farms or online.

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