Prepare the filling: In a medium bowl, mix graham cracker crumbs, mini marshmallows, and chocolate chips.
In a separate bowl, whisk together the eggs, flour, baking powder, vanilla extract, and a pinch of salt until smooth.
Take a portion of the filling, about a tablespoon, and shape it into a ball. Repeat with the remaining mixture.
Dip each filled ball into the batter, ensuring it is fully coated before gently placing it in hot oil.
Heat vegetable oil in a deep pot to 350°F (175°C). Carefully add the coated balls to the hot oil.
Fry the bombs for about 3-4 minutes, turning occasionally until golden brown and cooked through.
Remove the bombs from the oil and let them drain on paper towels while still hot.
Dust with powdered sugar before serving to add a sweet touch.