Chocolate-Oatmeal Moon Pies

Cookies:

• 1 1/4 cups unbleached all-purpose flour
• 3/4 teaspoon baking powder
• 1/2 teaspoon baking soda
• 1/2 teaspoon kosher salt
• 2 1/4 cups old-fashioned oats
• 1 cup dried tart cherries, chopped
• 1 cup pecans, chopped
• 3/4 cup semisweet or bittersweet chocolate (4 ounces), chopped into chocolate chip–size chunks
• 3/4 cup (1 1/2 sticks) unsalted butter, room temperature
• 1 1/2 cups (packed) dark brown sugar
• 1 large egg
• 1 teaspoon vanilla extract
• 2 7-ounce jars marshmallow creme

Chocolate dipping sauce:

• 1/2 cup semisweet or bittersweet chocolate (2 1/2 ounces), chopped
• 1 tablespoon honey
• 1/2 cup heavy cream