Spoon 1/3 cup of the baking bits into a clean, wide-mouth 1-quart jar.
Whisk together the flour, baking powder, and salt in a small bowl. Spoon the mixture into the jar. Gently tap the jar on the counter to even out the flour.
Spoon another 1/2 cup baking bits on top of the flour.
Spoon the light brown sugar and then the granulated sugar into the jar.
Spoon the remaining 1/3 cup baking bits into the jar.
Seal the jar tightly. It will be filled to the top. (Confetti Cookies in a Jar will keep for several weeks in a cool, dry pantry.)
CONFETTI COOKIES RECIPE
1 jar Confetti Cookie Mix
2 sticks (1 cup) unsalted butter, melted
2 large eggs
1 1/2 teaspoon vanilla extract
Preheat the oven to 350 degrees F.
Pour the contents of this jar into a large bowl and stir to combine. Stir in melted butter, eggs, and vanilla extract. Refrigerate the dough for 15 minutes to firm up.
Drop tablespoonfuls of dough onto ungreased baking sheets, 3-inches apart.
Bake until the edges of the cookies are golden and the tops are set, 13 to 15 minutes. Cool on wire racks.