In a small bowl; whisk together yogurt, egg, vanilla, milk and lemon juice.

In a large mixing bowl; combine flour, baking soda, baking powder, salt, sugar and nutmeg.

Add yogurt mixture and melted butter to dry ingredients and whisk until smooth.

Place mix in a large Ziploc bag and cut the tip off one of the corners.

Squeeze mix into greased 6-count doughnut pan; fill until almost completely full for a thicker doughnut.

Bake at 375 degrees for around 12-14 minutes until doughnut is cooked through.

You may have to cut the holes back out of one of the doughnut sides with narrow knife.

Allow doughnut to cool completely.

Cut doughnuts in half (sandwich style).

Prepare chocolate glaze:

Add chocolate chips. butter, milk and vanilla to microwave-safe bowl.

Microwave for around 20 seconds and stir; return to microwave and microwave 10-15 seconds and stir. Don't allow chocolate to boil to ensure smoothness.

Spread a small amount glaze evenly to the bottom half of each doughnut.

Top the glaze with mini marshmallows (as many as you can fit).

Using a kitchen torch; lightly toast each marshmallow until melted.

Top with the other doughnut half and add desired amount of glaze to the top.

Sprinkle with graham cracker crumbs.

Note: If you don't have a kitchen torch; you can top each doughnut half with Hershey Bar pieces and marshmallows, place on a cookie sheet and briefly broil until marshmallows begin to melt.