If you use frozen berries, take them out of the freezer and let them thaw. Drain the excess liquid by putting the berries in a big sifter.
Place the softened butter in a large mixing bowl, and with a hand mixer mix until smooth. Add the sugar and salt to it and combine.
Add the eggs - one at a time and mix well in between.
Add vegetable oil, vanilla extract, and white vinegar and beat until combined.
Then add plain greek yogurt and buttermilk to the mixture.
Sift the flour and baking soda and fold it into the wet ingredients. Don't over mix the batter.
Add the drained frozen berries (or fresh berries) and carefully fold them into the batter. Don't mix for too long, or the berries get crushed, and you will end up with a blue or purple batter.
Use a cookie scoop and place the batter into the Tulip muffin liners. This batter will make 12 muffins.
Add the crumble topping over the muffins and bake them for about 20-25 minutes.