feat: add Meringues. Fixes #470.

cook/cookies-and-bars/Meringues.cook

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+>> source: King Arthur
+>> serves: 36
+>> total time: 4 hours 30 minutes
+
+Preheat the oven to 200°F. Line a #baking sheet{} with #parchment paper or aluminum foil{}, shiny side up.
+
+In a #large bowl{}, combine the @egg whites{2%large}, @cream of tartar{1/4%tsp}, and @salt{1%dash}. Beat until soft peaks form, then gradually add the @granulated sugar{98%g}, continuing to beat until the mixture is stiff and glossy. Add the @vanilla{1%tsp} at the end.
+
+Drop the meringue by large spoonfuls onto the prepared baking sheet and sprinkle each meringue with a bit of sugar. Bake for ~{1.5%hours}. Turn off the heat and leave the meringues in the oven until they're completely cool, ~{3%hours} or more. These are good to make in the evening; they can be left in the oven, with the heat turned off, overnight. Store them in an airtight container to keep them crisp.
+
+Cocoa meringues: Sift together 28 g confectioners' sugar and 2 Tbsp (11 g) unsweetened cocoa. Use 50 g granulated sugar while beating the egg whites and fold in the cocoa mixture and vanilla before baking.
+
+Chocolate chip meringues: Fold in 84 g mini chocolate chips (or any other flavored chips you like) or shaved chocolate before baking.
+
+Vermont maple meringues: Substitute the following for the sugar: 84 g granulated maple sugar, 1/2 to 1 tsp maple flavor (to taste) and additional maple sugar, for sprinkling.

docs/cookies-and-bars/meringues.md

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+---
+comments: true
+tags:
+  - cookie
+  - dessert
+  - king-arthur
+---
+# :egg: Meringues
+
+![Meringues](../assets/images/meringues.jpg)
+
+| :fork_and_knife_with_plate: Serves | :timer_clock: Total Time |
+|:----------------------------------:|:-----------------------: |
+| 36 | 4.50 hours |
+
+## :salt: Ingredients
+
+- :egg: 2 large egg whites
+- :rice: 0.25 tsp cream of tartar
+- :salt: 1 dash salt
+- :candy: 98 g granulated sugar
+- :icecream: 1 tsp vanilla
+
+## :cooking: Cookware
+
+- 1 baking sheet
+- 1 parchment paper or aluminum foil
+- 1 large bowl
+
+## :pencil: Instructions
+
+### Step 1
+
+Preheat the oven to 200°F. Line a baking sheet with parchment paper or aluminum foil, shiny side up.
+
+### Step 2
+
+In a large bowl, combine the egg whites, cream of tartar, and salt. Beat until soft peaks form, then gradually add the
+granulated sugar, continuing to beat until the mixture is stiff and glossy. Add the vanilla at the end.
+
+### Step 3
+
+Drop the meringue by large spoonfuls onto the prepared baking sheet and sprinkle each meringue with a bit of sugar. Bake
+for 1.5 hours. Turn off the heat and leave the meringues in the oven until they're completely cool, 3 hours or more.
+These are good to make in the evening; they can be left in the oven, with the heat turned off, overnight. Store them in
+an airtight container to keep them crisp.
+
+!!! info "Cocoa meringues"
+
+    Sift together 28 g confectioners' sugar and 2 Tbsp (11 g) unsweetened cocoa. Use 50 g granulated sugar
+    while beating the egg whites and fold in the cocoa mixture and vanilla before baking.
+
+!!! info "Chocolate chip meringues"
+
+    Fold in 84 g mini chocolate chips (or any other flavored chips you like) or shaved chocolate
+    before baking.
+
+!!! info "Vermont maple meringues"
+
+    Substitute the following for the sugar: 84 g granulated maple sugar, 1/2 to 1 tsp maple flavor
+    (to taste) and additional maple sugar, for sprinkling.
+
+## :link: Source
+
+- King Arthur

mkdocs.yml

@@ -152,6 +152,7 @@ nav:
       - King Arthur's Snickerdoodles: cookies-and-bars/king-arthur's-snickerdoodles.md
       - Ladyfingers: cookies-and-bars/ladyfingers.md
       - Lemon Bars: cookies-and-bars/lemon-bars.md
+      - Meringues: cookies-and-bars/meringues.md
       - Millionaire's Shortbread: cookies-and-bars/millionaire's-shortbread.md
       - Mini Madeleines: cookies-and-bars/mini-madeleines.md
       - Molasses Spice Cookies: cookies-and-bars/molasses-spice-cookies.md