This recipe has been tried and tested over a dozen times creating the best blueberry muffins you’ll ever have. European style salted butter – I lived in the UK for many years and now use European style butter when baking (it has a higher butterfat ratio and is less sweet than American butter). It’s widely available in US grocery stores. Leave a comment if you want more details. That said, regular unslated (or salted) butter works just as well. It’s simply a matter of preference. Full Fat Sour Cream – unless specifically stated, full-fat sour cream should always be used in baking recipes. When heated, low-fat sour cream becomes liquid and will change the outcome of the recipe. Canola Oil – the recipe calls for vegetable oil because it’s what most people have in their kitchens. I prefer canola because it’s flavorless. Brown free-range large eggs – this is purely my preference. Any large eggs will do. Mix the sour cream, vanilla, oil and milk right into the warmed butter. In a large mixing bowl mix together the flour, sugar, baking soda, baking powder, and salt then form a well in the middle. Add the sour cream mixture and eggs. Mix well to combine. Note: The mixture will be thick. Fold in the blueberries. Divide the batter between muffin cups in the pan. Bake until golden and a cake tester comes out clean. Erren’s Kitchen is written and produced for informational intentions only. We are not certified nutritionists, and the nutritional information found on this site has not been assessed or authorized by a nutritionist or the FDA. The nutritional information found in our recipes is offered as an estimate and should not be considered a guarantee or fact. The estimated data is provided as a courtesy and calculated through a third-party online nutritional calculator, spoonacular API. Although we do our best to provide accurate nutritional information, these figures should be considered rough estimates. Many factors, such as brands or products purchased and the nutritional fluctuations that naturally occur in fresh produce, can alter the effectiveness of the nutritional information in any recipe. Furthermore, various online calculators provide different results depending on their particular algorithms and nutrition fact sources. To obtain the most precise nutritional information in a provided recipe, you should calculate the nutritional information with the exact ingredients you are using when preparing the recipe using your preferred nutrition calculator.