Pre-heat your oven to 400 degrees F. Then grease a loaf tin with butter then line it with parchment.
In a medium-sized bowl, whisk together the flour, salt, baking soda, and sugar. In a separate larger bowl, mix together the egg, milk, sour cream, and melted butter until smooth. Slowly whisk the dry ingredients into the wet until the flour is mostly combined.
In a separate bowl, mix together all the streusel ingredients until it's crumbly.
Pour half the cake batter into the loaf pan, sprinkle half the streusel on top. Repeat that with the second half of batter and streusel then put the loaf to bake. Bake the coffee cake for 25-30 minutes or until a toothpick comes out clean. When it's ready, let the loaf cool until it reaches room temp, then enjoy!! <3
Servings 0