Chop 12 ounces bittersweet chocolate into small chunks and layer on the bottom of a standard quart-size mason jar, or an equivalent-size jar. Tap the jar to level it and settle the chips. In a bowl, combine 2 cups all-purpose flour with 1/2 teaspoon baking powder and 1/2 teaspoon salt. Layer the mixture on top of the chocolate. Add 3/4 cup of coarsely chopped walnuts or pecans. Layer 3/4 cup of firmly packed brown sugar on top.
Seal the jar, tie it with a ribbon, and attach a gift card with this simple recipe: "Preheat oven to 350°. Have ready 2 nonstick baking sheets. Using a mixer or wooden spoon, cream together 3/4 cup (1 1/2 sticks) softened butter with the brown sugar in the jar. Add 2 eggs, mixing them in one at a time. Add 1 1/2 teaspoon vanilla extract and blend. Add the remaining ingredients from the jar and mix just until all the flour is absorbed. Use 2 tablespoon cookie dough for each cookie, and space them an inch apart on the baking sheets. Bake until golden brown, 12 to 15 minutes. Cool on wire racks. Makes about 24 cookies."
Our December issue features Oprah's Favorite Things—as well as your chance to win them all! You'll also find our easy holiday declutter plan, Dr. Oz's guide to sleeping better (starting tonight) and the ultimate holiday menu.