Preheat the oven to 375˚F. Line a muffin tin with paper liners and set aside.
In the bowl of a stand mixer, mix together the flour, salt, baking powder and sugar. Mix in the peanut butter until crumbly.
In a medium bowl, whisk together the eggs, milk, vanilla extract and coconut oil.
Slowly mix the egg mixture into the flour mixture until just combined.
Fill each cup halfway with the batter. Spoon 1 tablespoon of strawberry preserves unto each cup, then top with the remaining batter.
Bake in the preheated oven for 18-20 minutes.
Allow to cool in the muffin tin.