Kid-friendly Swedish Sticky "Kladdkaka" (Chocolate Cake) Recipe - Sticky Fingers Cooking

Ingredients

• 1/2 orange (for 2 tsp orange zest)
• 3/4 C all-purpose flour **(for GLUTEN ALLERGY sub gluten-free/nut-free all-purpose flour)**
• 1/4 C pure unsweetened cocoa powder **(for DAIRY ALLERGY check label for small amounts of dairy; for CHOCOLATE ALLERGY sub carob powder)**
• 1 pinch salt
• 2 eggs **(for EGG ALLERGY sub 2 T ground flaxseeds + 6 T water—more info below)**
• 1 1/3 C granulated sugar
• 1/2 C very soft butter **(for DAIRY ALLERGY substitute dairy-free/nut-free butter, like Earth Balance, OR 1/2 C melted coconut or other nut-free oil)**
• 1 tsp vanilla extract, optional **(for GLUTEN ALLERGY use certified gluten-free pure vanilla extract, not imitation vanilla flavor—check label)**
• butter or nut-free oil for greasing pan