S'mores Tartlets

10 tablespoons unsalted butter, at room temperature

1/2 cup light brown sugar, lightly packed

2 tablespoons honey

1 cup all-purpose flour, plus extra for rolling

2/3 cup whole wheat flour

1/3 cup wheat germ

1/2 teaspoon kosher salt

3/4 teaspoon baking soda

3/4 teaspoon ground cinnamon

For the Chocolate Ganache Filling

1 cup heavy cream

1/4 cup whole milk

1 tablespoon unsalted butter

7 ounces semisweet chocolate chips

For the Marshmallow Meringue

2 large egg whites

2/3 cup sugar

1/2 vanilla bean, split and seeded

1 tablespoon light corn syrup

1/3 cup water