Preheat oven to 375°F (190°C) and line a 12-cup muffin pan with paper liners.
In a small bowl, mix together walnuts, pistachios, sugar, and cinnamon. Set aside.
In a large bowl, whisk together yogurt, egg, brown sugar, melted butter, and vanilla until smooth.
In another bowl, combine flour, baking powder, baking soda, and salt.
Gradually add the dry ingredients to the wet mixture and stir just until combined—do not overmix.
Spoon a small amount of batter into each muffin cup, then add a teaspoon of nut mixture. Repeat layers, finishing with batter and a sprinkle of nuts on top.
Bake for 15-18 minutes, or until golden brown and a toothpick comes out clean.
While muffins bake, warm the honey slightly in the microwave or on the stovetop.
Once muffins are done, drizzle warm honey over each while still hot. Let cool before serving.