Simple but bursting with berry flavour and crunchy top.
Preheat oven to 190ºC. Grease a 12-hole (cup) muffin pan.
Sift flour into a large bowl and stir in brown sugar. In a medium sized bowl place eggs, butter, buttermilk and vanilla. Whisk to combine. Add to flour mixture and stir until just combined. Gently stir in raspberries.
Divide mixture among holes of prepared pan.
To make the topping, rub butter into flour and stir in sugar and oats. Sprinkle over muffins.
Bake muffins for about 20 - 25 minutes. Let stand in pan for 10 minutes before turning onto a wire rack.